diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/descriptors/AbstractLazyMemberScope.java b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/descriptors/AbstractLazyMemberScope.java
index a1b0b20e255..812af6eed8e 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/descriptors/AbstractLazyMemberScope.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/descriptors/AbstractLazyMemberScope.java
@@ -51,7 +51,8 @@ public abstract class AbstractLazyMemberScope<D extends DeclarationDescriptor, D
     private final MemoizedFunctionToNotNull<Name, Set<FunctionDescriptor>> functionDescriptors;
     private final MemoizedFunctionToNotNull<Name, Set<VariableDescriptor>> propertyDescriptors;
 
-    private final NotNullLazyValue<Collection<DeclarationDescriptor>> allDescriptors;
+    private final NotNullLazyValue<Collection<DeclarationDescriptor>> descriptorsFromDeclaredElements;
+    private final NotNullLazyValue<Collection<DeclarationDescriptor>> extraDescriptors;
 
     protected AbstractLazyMemberScope(
             @NotNull ResolveSession resolveSession,
@@ -83,10 +84,16 @@ public abstract class AbstractLazyMemberScope<D extends DeclarationDescriptor, D
             }
         });
 
-        this.allDescriptors = storageManager.createLazyValue(new Function0<Collection<DeclarationDescriptor>>() {
+        this.descriptorsFromDeclaredElements = storageManager.createLazyValue(new Function0<Collection<DeclarationDescriptor>>() {
             @Override
             public Collection<DeclarationDescriptor> invoke() {
-                return computeAllDescriptors();
+                return computeDescriptorsFromDeclaredElements();
+            }
+        });
+        this.extraDescriptors = storageManager.createLazyValue(new Function0<Collection<DeclarationDescriptor>>() {
+            @Override
+            public Collection<DeclarationDescriptor> invoke() {
+                return computeExtraDescriptors();
             }
         });
     }
@@ -199,13 +206,21 @@ public abstract class AbstractLazyMemberScope<D extends DeclarationDescriptor, D
     @NotNull
     @Override
     public Collection<DeclarationDescriptor> getAllDescriptors() {
-        return allDescriptors.invoke();
+        Collection<DeclarationDescriptor> result = new LinkedHashSet<DeclarationDescriptor>(getDescriptorsFromDeclaredElements());
+        result.addAll(extraDescriptors.invoke());
+        return result;
     }
 
     @NotNull
-    private Collection<DeclarationDescriptor> computeAllDescriptors() {
-        Collection<DeclarationDescriptor> result = new LinkedHashSet<DeclarationDescriptor>();
-        for (JetDeclaration declaration : declarationProvider.getAllDeclarations()) {
+    /*package*/ Collection<DeclarationDescriptor> getDescriptorsFromDeclaredElements() {
+        return descriptorsFromDeclaredElements.invoke();
+    }
+
+    @NotNull
+    private Collection<DeclarationDescriptor> computeDescriptorsFromDeclaredElements() {
+        List<JetDeclaration> declarations = declarationProvider.getAllDeclarations();
+        ArrayList<DeclarationDescriptor> result = new ArrayList<DeclarationDescriptor>(declarations.size());
+        for (JetDeclaration declaration : declarations) {
             if (declaration instanceof JetClassOrObject) {
                 JetClassOrObject classOrObject = (JetClassOrObject) declaration;
                 result.addAll(classDescriptors.invoke(safeNameForLazyResolve(classOrObject.getNameAsName())));
@@ -230,11 +245,12 @@ public abstract class AbstractLazyMemberScope<D extends DeclarationDescriptor, D
                 throw new IllegalArgumentException("Unsupported declaration kind: " + declaration);
             }
         }
-        addExtraDescriptors(result);
+        result.trimToSize();
         return result;
     }
 
-    protected abstract void addExtraDescriptors(@NotNull Collection<DeclarationDescriptor> result);
+    @NotNull
+    protected abstract Collection<DeclarationDescriptor> computeExtraDescriptors();
 
     @NotNull
     @Override
diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/descriptors/LazyClassDescriptor.java b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/descriptors/LazyClassDescriptor.java
index 365b9630359..dfb15ae442a 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/descriptors/LazyClassDescriptor.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/descriptors/LazyClassDescriptor.java
@@ -23,6 +23,7 @@ import com.intellij.psi.PsiElement;
 import jet.Function0;
 import jet.Function1;
 import jet.Unit;
+import kotlin.KotlinPackage;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.jet.lang.descriptors.*;
@@ -31,7 +32,6 @@ import org.jetbrains.jet.lang.descriptors.impl.ClassDescriptorBase;
 import org.jetbrains.jet.lang.psi.*;
 import org.jetbrains.jet.lang.resolve.AnnotationResolver;
 import org.jetbrains.jet.lang.resolve.BindingContext;
-import org.jetbrains.jet.lang.descriptors.ClassDescriptorWithResolutionScopes;
 import org.jetbrains.jet.lang.resolve.DescriptorUtils;
 import org.jetbrains.jet.lang.resolve.lazy.ForceResolveUtil;
 import org.jetbrains.jet.lang.resolve.lazy.LazyEntity;
@@ -209,6 +209,22 @@ public class LazyClassDescriptor extends ClassDescriptorBase implements LazyEnti
         return scopeForPropertyInitializerResolution.invoke();
     }
 
+    @NotNull
+    @Override
+    public Collection<CallableMemberDescriptor> getDeclaredCallableMembers() {
+        //noinspection unchecked
+        return (Collection) KotlinPackage.filter(
+                unsubstitutedMemberScope.getDescriptorsFromDeclaredElements(),
+                new Function1<DeclarationDescriptor, Boolean>() {
+                    @Override
+                    public Boolean invoke(DeclarationDescriptor descriptor) {
+                        return descriptor instanceof CallableMemberDescriptor
+                               && ((CallableMemberDescriptor) descriptor).getKind() != CallableMemberDescriptor.Kind.FAKE_OVERRIDE;
+                    }
+                }
+        );
+    }
+
     @NotNull
     private JetScope computeScopeForPropertyInitializerResolution() {
         ConstructorDescriptor primaryConstructor = getUnsubstitutedPrimaryConstructor();
diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/descriptors/LazyClassMemberScope.java b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/descriptors/LazyClassMemberScope.java
index 2bfb29a0ccc..cd807b5a5d5 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/descriptors/LazyClassMemberScope.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/descriptors/LazyClassMemberScope.java
@@ -36,10 +36,7 @@ import org.jetbrains.jet.lang.types.JetType;
 import org.jetbrains.jet.lang.types.lang.KotlinBuiltIns;
 import org.jetbrains.jet.storage.NullableLazyValue;
 
-import java.util.Collection;
-import java.util.Collections;
-import java.util.List;
-import java.util.Set;
+import java.util.*;
 
 import static org.jetbrains.jet.lang.descriptors.CallableMemberDescriptor.Kind.DELEGATION;
 import static org.jetbrains.jet.lang.descriptors.CallableMemberDescriptor.Kind.FAKE_OVERRIDE;
@@ -290,7 +287,9 @@ public class LazyClassMemberScope extends AbstractLazyMemberScope<LazyClassDescr
     }
 
     @Override
-    protected void addExtraDescriptors(@NotNull Collection<DeclarationDescriptor> result) {
+    @NotNull
+    protected Collection<DeclarationDescriptor> computeExtraDescriptors() {
+        ArrayList<DeclarationDescriptor> result = new ArrayList<DeclarationDescriptor>();
         for (JetType supertype : thisDescriptor.getTypeConstructor().getSupertypes()) {
             for (DeclarationDescriptor descriptor : supertype.getMemberScope().getAllDescriptors()) {
                 if (descriptor instanceof FunctionDescriptor) {
@@ -307,6 +306,9 @@ public class LazyClassMemberScope extends AbstractLazyMemberScope<LazyClassDescr
         result.addAll(getFunctions(DescriptorFactory.VALUE_OF_METHOD_NAME));
 
         addDataClassMethods(result);
+
+        result.trimToSize();
+        return result;
     }
 
     private void addDataClassMethods(@NotNull Collection<DeclarationDescriptor> result) {
diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/descriptors/LazyPackageMemberScope.java b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/descriptors/LazyPackageMemberScope.java
index eea90829f92..c3788aa3432 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/descriptors/LazyPackageMemberScope.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/descriptors/LazyPackageMemberScope.java
@@ -28,6 +28,7 @@ import org.jetbrains.jet.lang.resolve.name.Name;
 import org.jetbrains.jet.lang.resolve.scopes.JetScope;
 
 import java.util.Collection;
+import java.util.Collections;
 import java.util.Set;
 
 public class LazyPackageMemberScope extends AbstractLazyMemberScope<PackageFragmentDescriptor, PackageMemberDeclarationProvider> {
@@ -72,8 +73,10 @@ public class LazyPackageMemberScope extends AbstractLazyMemberScope<PackageFragm
         // No extra properties
     }
 
+    @NotNull
     @Override
-    protected void addExtraDescriptors(@NotNull Collection<DeclarationDescriptor> result) {
+    protected Collection<DeclarationDescriptor> computeExtraDescriptors() {
+        return Collections.emptyList();
     }
 
     @Override
diff --git a/core/descriptors/src/org/jetbrains/jet/lang/descriptors/ClassDescriptorWithResolutionScopes.java b/core/descriptors/src/org/jetbrains/jet/lang/descriptors/ClassDescriptorWithResolutionScopes.java
index 3ad08c246d9..1a4e561a699 100644
--- a/core/descriptors/src/org/jetbrains/jet/lang/descriptors/ClassDescriptorWithResolutionScopes.java
+++ b/core/descriptors/src/org/jetbrains/jet/lang/descriptors/ClassDescriptorWithResolutionScopes.java
@@ -17,8 +17,11 @@
 package org.jetbrains.jet.lang.descriptors;
 
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.ReadOnly;
 import org.jetbrains.jet.lang.resolve.scopes.JetScope;
 
+import java.util.Collection;
+
 public interface ClassDescriptorWithResolutionScopes extends ClassDescriptor {
     @NotNull
     JetScope getScopeForClassHeaderResolution();
@@ -28,4 +31,8 @@ public interface ClassDescriptorWithResolutionScopes extends ClassDescriptor {
 
     @NotNull
     JetScope getScopeForInitializerResolution();
+
+    @NotNull
+    @ReadOnly
+    Collection<CallableMemberDescriptor> getDeclaredCallableMembers();
 }
diff --git a/core/descriptors/src/org/jetbrains/jet/lang/descriptors/impl/MutableClassDescriptor.java b/core/descriptors/src/org/jetbrains/jet/lang/descriptors/impl/MutableClassDescriptor.java
index 329edf6b0be..e71edc99b1d 100644
--- a/core/descriptors/src/org/jetbrains/jet/lang/descriptors/impl/MutableClassDescriptor.java
+++ b/core/descriptors/src/org/jetbrains/jet/lang/descriptors/impl/MutableClassDescriptor.java
@@ -107,6 +107,7 @@ public class MutableClassDescriptor extends MutableClassDescriptorLite implement
         return properties;
     }
 
+    @Override
     @NotNull
     public Set<CallableMemberDescriptor> getDeclaredCallableMembers() {
         return declaredCallableMembers;