diff --git a/idea/src/org/jetbrains/jet/plugin/JetPluginUtil.java b/idea/src/org/jetbrains/jet/plugin/JetPluginUtil.java
index 9d19e277e00..9caa71d2209 100644
--- a/idea/src/org/jetbrains/jet/plugin/JetPluginUtil.java
+++ b/idea/src/org/jetbrains/jet/plugin/JetPluginUtil.java
@@ -21,6 +21,10 @@ import com.intellij.ide.plugins.IdeaPluginDescriptor;
 import com.intellij.ide.plugins.PluginManager;
 import com.intellij.openapi.extensions.PluginId;
 import com.intellij.openapi.project.Project;
+import com.intellij.openapi.roots.ProjectFileIndex;
+import com.intellij.openapi.vfs.VirtualFile;
+import com.intellij.psi.PsiElement;
+import com.intellij.psi.PsiFile;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.jet.lang.descriptors.DeclarationDescriptor;
 import org.jetbrains.jet.lang.descriptors.ModuleDescriptor;
@@ -78,6 +82,18 @@ public class JetPluginUtil {
         return libraryScope == ((NamespaceDescriptor) declaration).getMemberScope();
     }
 
+    public static boolean isInSourceContent(@NotNull PsiElement element) {
+        PsiFile containingFile = element.getContainingFile();
+        if (containingFile == null) {
+            return false;
+        }
+        VirtualFile virtualFile = containingFile.getVirtualFile();
+        if (virtualFile == null) {
+            return false;
+        }
+        return ProjectFileIndex.SERVICE.getInstance(element.getProject()).isInSourceContent(virtualFile);
+    }
+
     @NotNull
     public static String getPluginVersion() {
         IdeaPluginDescriptor plugin = PluginManager.getPlugin(PluginId.getId("org.jetbrains.kotlin"));
diff --git a/idea/src/org/jetbrains/jet/plugin/highlighter/DebugInfoAnnotator.java b/idea/src/org/jetbrains/jet/plugin/highlighter/DebugInfoAnnotator.java
index f1647237d1e..dc454d24d94 100644
--- a/idea/src/org/jetbrains/jet/plugin/highlighter/DebugInfoAnnotator.java
+++ b/idea/src/org/jetbrains/jet/plugin/highlighter/DebugInfoAnnotator.java
@@ -26,6 +26,7 @@ import org.jetbrains.jet.checkers.DebugInfoUtil;
 import org.jetbrains.jet.lang.psi.JetFile;
 import org.jetbrains.jet.lang.psi.JetReferenceExpression;
 import org.jetbrains.jet.lang.resolve.BindingContext;
+import org.jetbrains.jet.plugin.JetPluginUtil;
 import org.jetbrains.jet.plugin.project.WholeProjectAnalyzerFacade;
 
 /**
@@ -39,7 +40,7 @@ public class DebugInfoAnnotator implements Annotator {
 
     @Override
     public void annotate(@NotNull PsiElement element, @NotNull final AnnotationHolder holder) {
-        if (!isDebugInfoEnabled() || !JetPsiChecker.isErrorReportingEnabled() || !JetPsiChecker.isInSourceContent(element)) {
+        if (!isDebugInfoEnabled() || !JetPsiChecker.isErrorReportingEnabled() || !JetPluginUtil.isInSourceContent(element)) {
             return;
         }
 
diff --git a/idea/src/org/jetbrains/jet/plugin/highlighter/JetLineMarkerProvider.java b/idea/src/org/jetbrains/jet/plugin/highlighter/JetLineMarkerProvider.java
index bff8dcc2b71..4759a305af7 100644
--- a/idea/src/org/jetbrains/jet/plugin/highlighter/JetLineMarkerProvider.java
+++ b/idea/src/org/jetbrains/jet/plugin/highlighter/JetLineMarkerProvider.java
@@ -59,6 +59,7 @@ import org.jetbrains.jet.lang.resolve.BindingContext;
 import org.jetbrains.jet.lang.resolve.BindingContextUtils;
 import org.jetbrains.jet.lexer.JetTokens;
 import org.jetbrains.jet.plugin.JetBundle;
+import org.jetbrains.jet.plugin.JetPluginUtil;
 import org.jetbrains.jet.plugin.codeInsight.JetFunctionPsiElementCellRenderer;
 import org.jetbrains.jet.plugin.project.WholeProjectAnalyzerFacade;
 import org.jetbrains.jet.plugin.search.KotlinDefinitionsSearcher;
@@ -362,7 +363,7 @@ public class JetLineMarkerProvider implements LineMarkerProvider {
     public void collectSlowLineMarkers(@NotNull List<PsiElement> elements, @NotNull Collection<LineMarkerInfo> result) {
         if (elements.isEmpty() ||
             DumbService.getInstance(elements.get(0).getProject()).isDumb() ||
-            !JetPsiChecker.isInSourceContent(elements.get(0))) {
+            !JetPluginUtil.isInSourceContent(elements.get(0))) {
             return;
         }
 
diff --git a/idea/src/org/jetbrains/jet/plugin/highlighter/JetPsiChecker.java b/idea/src/org/jetbrains/jet/plugin/highlighter/JetPsiChecker.java
index 422f4a14e9c..77c0bf0138b 100644
--- a/idea/src/org/jetbrains/jet/plugin/highlighter/JetPsiChecker.java
+++ b/idea/src/org/jetbrains/jet/plugin/highlighter/JetPsiChecker.java
@@ -26,12 +26,9 @@ import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.editor.colors.TextAttributesKey;
 import com.intellij.openapi.progress.ProcessCanceledException;
-import com.intellij.openapi.roots.ProjectFileIndex;
 import com.intellij.openapi.util.TextRange;
-import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.MultiRangeReference;
 import com.intellij.psi.PsiElement;
-import com.intellij.psi.PsiFile;
 import com.intellij.psi.PsiReference;
 import com.intellij.xml.util.XmlStringUtil;
 import org.jetbrains.annotations.NotNull;
@@ -44,6 +41,7 @@ import org.jetbrains.jet.lang.diagnostics.rendering.DefaultErrorMessages;
 import org.jetbrains.jet.lang.psi.JetFile;
 import org.jetbrains.jet.lang.psi.JetReferenceExpression;
 import org.jetbrains.jet.lang.resolve.BindingContext;
+import org.jetbrains.jet.plugin.JetPluginUtil;
 import org.jetbrains.jet.plugin.project.WholeProjectAnalyzerFacade;
 import org.jetbrains.jet.plugin.quickfix.JetIntentionActionsFactory;
 import org.jetbrains.jet.plugin.quickfix.QuickFixes;
@@ -102,7 +100,7 @@ public class JetPsiChecker implements Annotator {
 
     @Override
     public void annotate(@NotNull PsiElement element, @NotNull AnnotationHolder holder) {
-        if (!isInSourceContent(element)) {
+        if (!JetPluginUtil.isInSourceContent(element)) {
             return;
         }
 
@@ -275,16 +273,4 @@ public class JetPsiChecker implements Annotator {
         annotation.setTooltip(getMessage(redeclarationDiagnostic));
         return annotation;
     }
-
-    public static boolean isInSourceContent(PsiElement element) {
-        PsiFile containingFile = element.getContainingFile();
-        if (containingFile == null) {
-            return false;
-        }
-        VirtualFile virtualFile = containingFile.getVirtualFile();
-        if (virtualFile == null) {
-            return false;
-        }
-        return ProjectFileIndex.SERVICE.getInstance(element.getProject()).isInSourceContent(virtualFile);
-    }
 }
diff --git a/idea/src/org/jetbrains/jet/plugin/search/KotlinReferencesSearcher.java b/idea/src/org/jetbrains/jet/plugin/search/KotlinReferencesSearcher.java
index 2d64b97f2bd..b9d45a65dea 100644
--- a/idea/src/org/jetbrains/jet/plugin/search/KotlinReferencesSearcher.java
+++ b/idea/src/org/jetbrains/jet/plugin/search/KotlinReferencesSearcher.java
@@ -28,7 +28,7 @@ import com.intellij.util.Processor;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.jet.asJava.LightClassUtil;
 import org.jetbrains.jet.lang.psi.*;
-import org.jetbrains.jet.plugin.highlighter.JetPsiChecker;
+import org.jetbrains.jet.plugin.JetPluginUtil;
 
 public class KotlinReferencesSearcher extends QueryExecutorBase<PsiReference, ReferencesSearch.SearchParameters> {
     public static void processJetClassOrObject(
@@ -51,7 +51,7 @@ public class KotlinReferencesSearcher extends QueryExecutorBase<PsiReference, Re
     @Override
     public void processQuery(@NotNull ReferencesSearch.SearchParameters queryParameters, @NotNull Processor<PsiReference> consumer) {
         PsiElement element = queryParameters.getElementToSearch();
-        if (!JetPsiChecker.isInSourceContent(element)) {
+        if (!JetPluginUtil.isInSourceContent(element)) {
             return;
         }
         if (element instanceof JetClass) {