diff --git a/js/js.translator/src/org/jetbrains/k2js/translate/context/StaticContext.java b/js/js.translator/src/org/jetbrains/k2js/translate/context/StaticContext.java
index 941bde126c1..2a260406d9f 100644
--- a/js/js.translator/src/org/jetbrains/k2js/translate/context/StaticContext.java
+++ b/js/js.translator/src/org/jetbrains/k2js/translate/context/StaticContext.java
@@ -27,14 +27,14 @@ import org.jetbrains.k2js.translate.context.generator.Generator;
 import org.jetbrains.k2js.translate.context.generator.Rule;
 import org.jetbrains.k2js.translate.intrinsic.Intrinsics;
 import org.jetbrains.k2js.translate.utils.AnnotationsUtils;
-import org.jetbrains.k2js.translate.utils.DescriptorUtils;
+import org.jetbrains.k2js.translate.utils.JsDescriptorUtils;
 import org.jetbrains.k2js.translate.utils.JsAstUtils;
 import org.jetbrains.k2js.translate.utils.PredefinedAnnotation;
 
 import java.util.Map;
 
 import static org.jetbrains.k2js.translate.utils.AnnotationsUtils.*;
-import static org.jetbrains.k2js.translate.utils.DescriptorUtils.*;
+import static org.jetbrains.k2js.translate.utils.JsDescriptorUtils.*;
 
 /**
  * @author Pavel Talanov
@@ -437,7 +437,7 @@ public final class StaticContext {
                     if (!(descriptor instanceof NamespaceDescriptor)) {
                         return null;
                     }
-                    if (DescriptorUtils.isTopLevelNamespace((NamespaceDescriptor)descriptor)) {
+                    if (JsDescriptorUtils.isTopLevelNamespace((NamespaceDescriptor) descriptor)) {
                         return true;
                     }
                     return null;
diff --git a/js/js.translator/src/org/jetbrains/k2js/translate/declaration/ClassDeclarationTranslator.java b/js/js.translator/src/org/jetbrains/k2js/translate/declaration/ClassDeclarationTranslator.java
index b68205b26b5..f1f803550b5 100644
--- a/js/js.translator/src/org/jetbrains/k2js/translate/declaration/ClassDeclarationTranslator.java
+++ b/js/js.translator/src/org/jetbrains/k2js/translate/declaration/ClassDeclarationTranslator.java
@@ -36,7 +36,7 @@ import org.jetbrains.k2js.translate.utils.ClassSortingUtils;
 import java.util.ArrayList;
 import java.util.List;
 
-import static org.jetbrains.k2js.translate.utils.DescriptorUtils.getAllClassesDefinedInNamespace;
+import static org.jetbrains.k2js.translate.utils.JsDescriptorUtils.getAllClassesDefinedInNamespace;
 import static org.jetbrains.k2js.translate.utils.JsAstUtils.*;
 
 /**
diff --git a/js/js.translator/src/org/jetbrains/k2js/translate/declaration/ClassTranslator.java b/js/js.translator/src/org/jetbrains/k2js/translate/declaration/ClassTranslator.java
index 1f13b9636eb..9c6c9b1e2f2 100644
--- a/js/js.translator/src/org/jetbrains/k2js/translate/declaration/ClassTranslator.java
+++ b/js/js.translator/src/org/jetbrains/k2js/translate/declaration/ClassTranslator.java
@@ -40,7 +40,7 @@ import java.util.Map;
 import static com.google.dart.compiler.util.AstUtil.newSequence;
 import static org.jetbrains.k2js.translate.utils.BindingUtils.getClassDescriptor;
 import static org.jetbrains.k2js.translate.utils.BindingUtils.getPropertyDescriptorForConstructorParameter;
-import static org.jetbrains.k2js.translate.utils.DescriptorUtils.*;
+import static org.jetbrains.k2js.translate.utils.JsDescriptorUtils.*;
 import static org.jetbrains.k2js.translate.utils.PsiUtils.getPrimaryConstructorParameters;
 import static org.jetbrains.k2js.translate.utils.TranslationUtils.getQualifiedReference;
 import static org.jetbrains.k2js.translate.utils.TranslationUtils.getThisObject;
diff --git a/js/js.translator/src/org/jetbrains/k2js/translate/declaration/NamespaceDeclarationTranslator.java b/js/js.translator/src/org/jetbrains/k2js/translate/declaration/NamespaceDeclarationTranslator.java
index e97cfffae61..cd6a5fdcabf 100644
--- a/js/js.translator/src/org/jetbrains/k2js/translate/declaration/NamespaceDeclarationTranslator.java
+++ b/js/js.translator/src/org/jetbrains/k2js/translate/declaration/NamespaceDeclarationTranslator.java
@@ -27,14 +27,14 @@ import org.jetbrains.jet.lang.psi.JetFile;
 import org.jetbrains.k2js.translate.context.Namer;
 import org.jetbrains.k2js.translate.context.TranslationContext;
 import org.jetbrains.k2js.translate.general.AbstractTranslator;
-import org.jetbrains.k2js.translate.utils.DescriptorUtils;
+import org.jetbrains.k2js.translate.utils.JsDescriptorUtils;
 import org.jetbrains.k2js.translate.utils.TranslationUtils;
 
 import java.util.List;
 import java.util.Set;
 
 import static org.jetbrains.k2js.translate.utils.BindingUtils.getAllNonNativeNamespaceDescriptors;
-import static org.jetbrains.k2js.translate.utils.DescriptorUtils.getAllClassesDefinedInNamespace;
+import static org.jetbrains.k2js.translate.utils.JsDescriptorUtils.getAllClassesDefinedInNamespace;
 import static org.jetbrains.k2js.translate.utils.JsAstUtils.setQualifier;
 
 /**
@@ -126,7 +126,7 @@ public final class NamespaceDeclarationTranslator extends AbstractTranslator {
     private static List<NamespaceDescriptor> filterTopLevelNamespaces(@NotNull List<NamespaceDescriptor> namespaceDescriptors) {
         List<NamespaceDescriptor> result = Lists.newArrayList();
         for (NamespaceDescriptor descriptor : namespaceDescriptors) {
-            if (DescriptorUtils.isTopLevelNamespace(descriptor)) {
+            if (JsDescriptorUtils.isTopLevelNamespace(descriptor)) {
                 result.add(descriptor);
             }
         }
@@ -137,7 +137,7 @@ public final class NamespaceDeclarationTranslator extends AbstractTranslator {
     private static List<NamespaceDescriptor> filterNonEmptyNamespaces(@NotNull List<NamespaceDescriptor> namespaceDescriptors) {
         List<NamespaceDescriptor> result = Lists.newArrayList();
         for (NamespaceDescriptor descriptor : namespaceDescriptors) {
-            if (!DescriptorUtils.isNamespaceEmpty(descriptor)) {
+            if (!JsDescriptorUtils.isNamespaceEmpty(descriptor)) {
                 result.add(descriptor);
             }
         }
diff --git a/js/js.translator/src/org/jetbrains/k2js/translate/declaration/NamespaceTranslator.java b/js/js.translator/src/org/jetbrains/k2js/translate/declaration/NamespaceTranslator.java
index c5e38968209..5c9d0ae03c1 100644
--- a/js/js.translator/src/org/jetbrains/k2js/translate/declaration/NamespaceTranslator.java
+++ b/js/js.translator/src/org/jetbrains/k2js/translate/declaration/NamespaceTranslator.java
@@ -24,7 +24,7 @@ import org.jetbrains.jet.lang.descriptors.NamespaceDescriptor;
 import org.jetbrains.k2js.translate.context.TranslationContext;
 import org.jetbrains.k2js.translate.general.AbstractTranslator;
 import org.jetbrains.k2js.translate.general.Translation;
-import org.jetbrains.k2js.translate.utils.DescriptorUtils;
+import org.jetbrains.k2js.translate.utils.JsDescriptorUtils;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -97,7 +97,7 @@ public final class NamespaceTranslator extends AbstractTranslator {
     @NotNull
     private List<JsPropertyInitializer> getNestedNamespaceDeclarations() {
         List<JsPropertyInitializer> result = Lists.newArrayList();
-        List<NamespaceDescriptor> nestedNamespaces = DescriptorUtils.getNestedNamespaces(descriptor);
+        List<NamespaceDescriptor> nestedNamespaces = JsDescriptorUtils.getNestedNamespaces(descriptor);
         for (NamespaceDescriptor nestedNamespace : nestedNamespaces) {
             NamespaceTranslator nestedNamespaceTranslator = new NamespaceTranslator(nestedNamespace, classDeclarationTranslator, context());
             result.add(nestedNamespaceTranslator.getDeclarationAsInitializer());
diff --git a/js/js.translator/src/org/jetbrains/k2js/translate/expression/FunctionTranslator.java b/js/js.translator/src/org/jetbrains/k2js/translate/expression/FunctionTranslator.java
index 9076fb0c937..a25486beab3 100644
--- a/js/js.translator/src/org/jetbrains/k2js/translate/expression/FunctionTranslator.java
+++ b/js/js.translator/src/org/jetbrains/k2js/translate/expression/FunctionTranslator.java
@@ -26,30 +26,23 @@ import org.jetbrains.jet.lang.psi.JetDeclarationWithBody;
 import org.jetbrains.jet.lang.psi.JetElement;
 import org.jetbrains.jet.lang.psi.JetExpression;
 import org.jetbrains.jet.lang.psi.JetFunctionLiteralExpression;
-import org.jetbrains.jet.lang.types.JetType;
-import org.jetbrains.jet.lang.types.lang.JetStandardClasses;
 import org.jetbrains.k2js.translate.context.Namer;
 import org.jetbrains.k2js.translate.context.TemporaryVariable;
 import org.jetbrains.k2js.translate.context.TranslationContext;
 import org.jetbrains.k2js.translate.general.AbstractTranslator;
-import org.jetbrains.k2js.translate.general.Translation;
 import org.jetbrains.k2js.translate.reference.ReferenceTranslator;
-import org.jetbrains.k2js.translate.utils.DescriptorUtils;
-import org.jetbrains.k2js.translate.utils.FunctionBodyTranslator;
+import org.jetbrains.k2js.translate.utils.JsDescriptorUtils;
 import org.jetbrains.k2js.translate.utils.TranslationUtils;
 import org.jetbrains.k2js.translate.utils.closure.ClosureContext;
 import org.jetbrains.k2js.translate.utils.closure.ClosureUtils;
-import org.jetbrains.k2js.translate.utils.mutator.Mutator;
 
 import java.util.ArrayList;
 import java.util.List;
 
 import static org.jetbrains.k2js.translate.utils.BindingUtils.getFunctionDescriptor;
-import static org.jetbrains.k2js.translate.utils.DescriptorUtils.*;
+import static org.jetbrains.k2js.translate.utils.JsDescriptorUtils.*;
 import static org.jetbrains.k2js.translate.utils.FunctionBodyTranslator.translateFunctionBody;
-import static org.jetbrains.k2js.translate.utils.JsAstUtils.convertToBlock;
 import static org.jetbrains.k2js.translate.utils.JsAstUtils.setParameters;
-import static org.jetbrains.k2js.translate.utils.mutator.LastExpressionMutator.mutateLastExpression;
 
 
 /**
@@ -228,7 +221,7 @@ public final class FunctionTranslator extends AbstractTranslator {
     }
 
     private boolean isExtensionFunction() {
-        return DescriptorUtils.isExtensionFunction(descriptor) && !isLiteral();
+        return JsDescriptorUtils.isExtensionFunction(descriptor) && !isLiteral();
     }
 
     private boolean isLiteral() {
diff --git a/js/js.translator/src/org/jetbrains/k2js/translate/expression/foreach/ArrayForTranslator.java b/js/js.translator/src/org/jetbrains/k2js/translate/expression/foreach/ArrayForTranslator.java
index bdd2eda0bb8..1807ffc5abd 100644
--- a/js/js.translator/src/org/jetbrains/k2js/translate/expression/foreach/ArrayForTranslator.java
+++ b/js/js.translator/src/org/jetbrains/k2js/translate/expression/foreach/ArrayForTranslator.java
@@ -32,7 +32,7 @@ import org.jetbrains.k2js.translate.utils.BindingUtils;
 import java.util.Collections;
 import java.util.List;
 
-import static org.jetbrains.k2js.translate.utils.DescriptorUtils.getClassDescriptorForType;
+import static org.jetbrains.k2js.translate.utils.JsDescriptorUtils.getClassDescriptorForType;
 import static org.jetbrains.k2js.translate.utils.JsAstUtils.*;
 import static org.jetbrains.k2js.translate.utils.PsiUtils.getLoopRange;
 import static org.jetbrains.k2js.translate.utils.TemporariesUtils.temporariesInitialization;
diff --git a/js/js.translator/src/org/jetbrains/k2js/translate/expression/foreach/RangeForTranslator.java b/js/js.translator/src/org/jetbrains/k2js/translate/expression/foreach/RangeForTranslator.java
index f951bdd1f89..1120a78773e 100644
--- a/js/js.translator/src/org/jetbrains/k2js/translate/expression/foreach/RangeForTranslator.java
+++ b/js/js.translator/src/org/jetbrains/k2js/translate/expression/foreach/RangeForTranslator.java
@@ -30,7 +30,7 @@ import org.jetbrains.k2js.translate.utils.BindingUtils;
 
 import java.util.List;
 
-import static org.jetbrains.k2js.translate.utils.DescriptorUtils.getClassDescriptorForType;
+import static org.jetbrains.k2js.translate.utils.JsDescriptorUtils.getClassDescriptorForType;
 import static org.jetbrains.k2js.translate.utils.JsAstUtils.*;
 import static org.jetbrains.k2js.translate.utils.PsiUtils.getLoopRange;
 import static org.jetbrains.k2js.translate.utils.TemporariesUtils.temporariesInitialization;
diff --git a/js/js.translator/src/org/jetbrains/k2js/translate/intrinsic/Intrinsics.java b/js/js.translator/src/org/jetbrains/k2js/translate/intrinsic/Intrinsics.java
index 4ee6151550f..2acd667e54b 100644
--- a/js/js.translator/src/org/jetbrains/k2js/translate/intrinsic/Intrinsics.java
+++ b/js/js.translator/src/org/jetbrains/k2js/translate/intrinsic/Intrinsics.java
@@ -34,15 +34,15 @@ import org.jetbrains.k2js.translate.intrinsic.primitive.*;
 import org.jetbrains.k2js.translate.intrinsic.string.CharAtIntrinsic;
 import org.jetbrains.k2js.translate.intrinsic.tuple.TupleAccessIntrinsic;
 import org.jetbrains.k2js.translate.operation.OperatorTable;
-import org.jetbrains.k2js.translate.utils.DescriptorUtils;
+import org.jetbrains.k2js.translate.utils.JsDescriptorUtils;
 
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
 import static org.jetbrains.jet.lang.types.expressions.OperatorConventions.*;
-import static org.jetbrains.k2js.translate.utils.DescriptorUtils.getFunctionByName;
-import static org.jetbrains.k2js.translate.utils.DescriptorUtils.getPropertyByName;
+import static org.jetbrains.k2js.translate.utils.JsDescriptorUtils.getFunctionByName;
+import static org.jetbrains.k2js.translate.utils.JsDescriptorUtils.getPropertyByName;
 
 //TODO: class is monstrous, should be refactored.
 
@@ -288,7 +288,7 @@ public final class Intrinsics {
         }
 
         private boolean isUnaryOperation(@NotNull FunctionDescriptor descriptor) {
-            return !DescriptorUtils.hasParameters(descriptor);
+            return !JsDescriptorUtils.hasParameters(descriptor);
         }
     }
 }
diff --git a/js/js.translator/src/org/jetbrains/k2js/translate/operation/BinaryOperationTranslator.java b/js/js.translator/src/org/jetbrains/k2js/translate/operation/BinaryOperationTranslator.java
index bf1f191349c..5389fae9639 100644
--- a/js/js.translator/src/org/jetbrains/k2js/translate/operation/BinaryOperationTranslator.java
+++ b/js/js.translator/src/org/jetbrains/k2js/translate/operation/BinaryOperationTranslator.java
@@ -39,7 +39,7 @@ import static org.jetbrains.k2js.translate.operation.AssignmentTranslator.isAssi
 import static org.jetbrains.k2js.translate.operation.CompareToTranslator.isCompareToCall;
 import static org.jetbrains.k2js.translate.utils.BindingUtils.getFunctionDescriptorForOperationExpression;
 import static org.jetbrains.k2js.translate.utils.BindingUtils.getResolvedCall;
-import static org.jetbrains.k2js.translate.utils.DescriptorUtils.isEquals;
+import static org.jetbrains.k2js.translate.utils.JsDescriptorUtils.isEquals;
 import static org.jetbrains.k2js.translate.utils.JsAstUtils.not;
 import static org.jetbrains.k2js.translate.utils.PsiUtils.*;
 import static org.jetbrains.k2js.translate.utils.TranslationUtils.*;
diff --git a/js/js.translator/src/org/jetbrains/k2js/translate/operation/CompareToTranslator.java b/js/js.translator/src/org/jetbrains/k2js/translate/operation/CompareToTranslator.java
index 74a6d5f778e..5e6c63b6d6e 100644
--- a/js/js.translator/src/org/jetbrains/k2js/translate/operation/CompareToTranslator.java
+++ b/js/js.translator/src/org/jetbrains/k2js/translate/operation/CompareToTranslator.java
@@ -30,7 +30,7 @@ import org.jetbrains.k2js.translate.intrinsic.CompareToIntrinsic;
 import org.jetbrains.k2js.translate.utils.TranslationUtils;
 
 import static org.jetbrains.k2js.translate.utils.BindingUtils.getFunctionDescriptorForOperationExpression;
-import static org.jetbrains.k2js.translate.utils.DescriptorUtils.isCompareTo;
+import static org.jetbrains.k2js.translate.utils.JsDescriptorUtils.isCompareTo;
 import static org.jetbrains.k2js.translate.utils.PsiUtils.getOperationToken;
 import static org.jetbrains.k2js.translate.utils.TranslationUtils.applyIntrinsicToBinaryExpression;
 import static org.jetbrains.k2js.translate.utils.TranslationUtils.isIntrinsicOperation;
diff --git a/js/js.translator/src/org/jetbrains/k2js/translate/reference/CallParametersResolver.java b/js/js.translator/src/org/jetbrains/k2js/translate/reference/CallParametersResolver.java
index 82a96c0466e..72f4e3652c9 100644
--- a/js/js.translator/src/org/jetbrains/k2js/translate/reference/CallParametersResolver.java
+++ b/js/js.translator/src/org/jetbrains/k2js/translate/reference/CallParametersResolver.java
@@ -24,7 +24,7 @@ import org.jetbrains.jet.lang.resolve.calls.ResolvedCall;
 import org.jetbrains.k2js.translate.context.TranslationContext;
 import org.jetbrains.k2js.translate.utils.TranslationUtils;
 
-import static org.jetbrains.k2js.translate.utils.DescriptorUtils.*;
+import static org.jetbrains.k2js.translate.utils.JsDescriptorUtils.*;
 
 /**
  * @author Pavel Talanov
diff --git a/js/js.translator/src/org/jetbrains/k2js/translate/reference/CallTranslator.java b/js/js.translator/src/org/jetbrains/k2js/translate/reference/CallTranslator.java
index ea05ba7ddc2..5cbb541079d 100644
--- a/js/js.translator/src/org/jetbrains/k2js/translate/reference/CallTranslator.java
+++ b/js/js.translator/src/org/jetbrains/k2js/translate/reference/CallTranslator.java
@@ -38,7 +38,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 import static org.jetbrains.k2js.translate.reference.CallParametersResolver.resolveCallParameters;
-import static org.jetbrains.k2js.translate.utils.DescriptorUtils.isConstructorDescriptor;
+import static org.jetbrains.k2js.translate.utils.JsDescriptorUtils.isConstructorDescriptor;
 import static org.jetbrains.k2js.translate.utils.JsAstUtils.*;
 
 /**
diff --git a/js/js.translator/src/org/jetbrains/k2js/translate/reference/InlinedCallExpressionTranslator.java b/js/js.translator/src/org/jetbrains/k2js/translate/reference/InlinedCallExpressionTranslator.java
index c10b7c16b64..d87781c06d4 100644
--- a/js/js.translator/src/org/jetbrains/k2js/translate/reference/InlinedCallExpressionTranslator.java
+++ b/js/js.translator/src/org/jetbrains/k2js/translate/reference/InlinedCallExpressionTranslator.java
@@ -43,8 +43,8 @@ import java.util.Map;
 import static org.jetbrains.k2js.translate.reference.CallParametersResolver.resolveCallParameters;
 import static org.jetbrains.k2js.translate.utils.BindingUtils.getFunctionForDescriptor;
 import static org.jetbrains.k2js.translate.utils.BindingUtils.getResolvedCallForCallExpression;
-import static org.jetbrains.k2js.translate.utils.DescriptorUtils.getExpectedReceiverDescriptor;
-import static org.jetbrains.k2js.translate.utils.DescriptorUtils.getExpectedThisDescriptor;
+import static org.jetbrains.k2js.translate.utils.JsDescriptorUtils.getExpectedReceiverDescriptor;
+import static org.jetbrains.k2js.translate.utils.JsDescriptorUtils.getExpectedThisDescriptor;
 import static org.jetbrains.k2js.translate.utils.FunctionBodyTranslator.translateFunctionBody;
 
 /**
diff --git a/js/js.translator/src/org/jetbrains/k2js/translate/reference/NativePropertyAccessTranslator.java b/js/js.translator/src/org/jetbrains/k2js/translate/reference/NativePropertyAccessTranslator.java
index 7f72df2f481..d0cafec5e4c 100644
--- a/js/js.translator/src/org/jetbrains/k2js/translate/reference/NativePropertyAccessTranslator.java
+++ b/js/js.translator/src/org/jetbrains/k2js/translate/reference/NativePropertyAccessTranslator.java
@@ -25,7 +25,7 @@ import org.jetbrains.jet.lang.descriptors.PropertyDescriptor;
 import org.jetbrains.k2js.translate.context.TranslationContext;
 import org.jetbrains.k2js.translate.utils.TranslationUtils;
 
-import static org.jetbrains.k2js.translate.utils.DescriptorUtils.getExpectedThisDescriptor;
+import static org.jetbrains.k2js.translate.utils.JsDescriptorUtils.getExpectedThisDescriptor;
 import static org.jetbrains.k2js.translate.utils.JsAstUtils.assignment;
 import static org.jetbrains.k2js.translate.utils.JsAstUtils.qualified;
 
diff --git a/js/js.translator/src/org/jetbrains/k2js/translate/utils/AnnotationsUtils.java b/js/js.translator/src/org/jetbrains/k2js/translate/utils/AnnotationsUtils.java
index 8067255bc0f..303ca774236 100644
--- a/js/js.translator/src/org/jetbrains/k2js/translate/utils/AnnotationsUtils.java
+++ b/js/js.translator/src/org/jetbrains/k2js/translate/utils/AnnotationsUtils.java
@@ -24,7 +24,7 @@ import org.jetbrains.jet.lang.descriptors.annotations.AnnotationDescriptor;
 import org.jetbrains.jet.lang.resolve.DescriptorUtils;
 import org.jetbrains.jet.lang.resolve.constants.CompileTimeConstant;
 
-import static org.jetbrains.k2js.translate.utils.DescriptorUtils.getContainingClass;
+import static org.jetbrains.k2js.translate.utils.JsDescriptorUtils.getContainingClass;
 
 /**
  * @author Pavel Talanov
diff --git a/js/js.translator/src/org/jetbrains/k2js/translate/utils/BindingUtils.java b/js/js.translator/src/org/jetbrains/k2js/translate/utils/BindingUtils.java
index 30d51c13e66..c9f522fb33b 100644
--- a/js/js.translator/src/org/jetbrains/k2js/translate/utils/BindingUtils.java
+++ b/js/js.translator/src/org/jetbrains/k2js/translate/utils/BindingUtils.java
@@ -34,7 +34,7 @@ import java.util.Set;
 
 import static org.jetbrains.jet.lang.resolve.BindingContext.INDEXED_LVALUE_GET;
 import static org.jetbrains.jet.lang.resolve.BindingContext.INDEXED_LVALUE_SET;
-import static org.jetbrains.k2js.translate.utils.DescriptorUtils.*;
+import static org.jetbrains.k2js.translate.utils.JsDescriptorUtils.*;
 
 /**
  * @author Pavel Talanov
@@ -140,7 +140,7 @@ public final class BindingUtils {
     public static boolean hasAncestorClass(@NotNull BindingContext context, @NotNull JetClassOrObject classDeclaration) {
         ClassDescriptor classDescriptor = getClassDescriptor(context, classDeclaration);
         List<ClassDescriptor> superclassDescriptors = getSuperclassDescriptors(classDescriptor);
-        return (DescriptorUtils.findAncestorClass(superclassDescriptors) != null);
+        return (JsDescriptorUtils.findAncestorClass(superclassDescriptors) != null);
     }
 
     public static boolean isStatement(@NotNull BindingContext context, @NotNull JetExpression expression) {
diff --git a/js/js.translator/src/org/jetbrains/k2js/translate/utils/ClassSortingUtils.java b/js/js.translator/src/org/jetbrains/k2js/translate/utils/ClassSortingUtils.java
index cf4817eda37..d522d241a33 100644
--- a/js/js.translator/src/org/jetbrains/k2js/translate/utils/ClassSortingUtils.java
+++ b/js/js.translator/src/org/jetbrains/k2js/translate/utils/ClassSortingUtils.java
@@ -25,7 +25,7 @@ import org.jetbrains.jet.lang.resolve.BindingContext;
 import java.util.ArrayList;
 import java.util.List;
 
-import static org.jetbrains.k2js.translate.utils.DescriptorUtils.getSuperclassDescriptors;
+import static org.jetbrains.k2js.translate.utils.JsDescriptorUtils.getSuperclassDescriptors;
 
 
 //TODO: can optimise using less dumb implementation
diff --git a/js/js.translator/src/org/jetbrains/k2js/translate/utils/DescriptorUtils.java b/js/js.translator/src/org/jetbrains/k2js/translate/utils/JsDescriptorUtils.java
similarity index 99%
rename from js/js.translator/src/org/jetbrains/k2js/translate/utils/DescriptorUtils.java
rename to js/js.translator/src/org/jetbrains/k2js/translate/utils/JsDescriptorUtils.java
index 364045342ce..a81bba4489b 100644
--- a/js/js.translator/src/org/jetbrains/k2js/translate/utils/DescriptorUtils.java
+++ b/js/js.translator/src/org/jetbrains/k2js/translate/utils/JsDescriptorUtils.java
@@ -36,9 +36,9 @@ import static org.jetbrains.k2js.translate.utils.BindingUtils.isNotAny;
 /**
  * @author Pavel Talanov
  */
-public final class DescriptorUtils {
+public final class JsDescriptorUtils {
 
-    private DescriptorUtils() {
+    private JsDescriptorUtils() {
     }
 
     private static int valueParametersCount(@NotNull FunctionDescriptor functionDescriptor) {
diff --git a/js/js.translator/src/org/jetbrains/k2js/translate/utils/TranslationUtils.java b/js/js.translator/src/org/jetbrains/k2js/translate/utils/TranslationUtils.java
index c036b836989..efdf8c9a8a5 100644
--- a/js/js.translator/src/org/jetbrains/k2js/translate/utils/TranslationUtils.java
+++ b/js/js.translator/src/org/jetbrains/k2js/translate/utils/TranslationUtils.java
@@ -34,8 +34,8 @@ import java.util.List;
 import static com.google.dart.compiler.util.AstUtil.newAssignment;
 import static org.jetbrains.k2js.translate.utils.BindingUtils.getFunctionDescriptorForOperationExpression;
 import static org.jetbrains.k2js.translate.utils.BindingUtils.getPropertyDescriptor;
-import static org.jetbrains.k2js.translate.utils.DescriptorUtils.getDeclarationDescriptorForReceiver;
-import static org.jetbrains.k2js.translate.utils.DescriptorUtils.getExpectedReceiverDescriptor;
+import static org.jetbrains.k2js.translate.utils.JsDescriptorUtils.getDeclarationDescriptorForReceiver;
+import static org.jetbrains.k2js.translate.utils.JsDescriptorUtils.getExpectedReceiverDescriptor;
 import static org.jetbrains.k2js.translate.utils.JsAstUtils.*;
 
 /**