Missing JetElementImplStub#getReferences() and getReference() implementation

compiler/frontend/src/org/jetbrains/jet/lang/psi/JetElementImplStub.java

@@ -19,6 +19,8 @@ package org.jetbrains.jet.lang.psi;
 import com.intellij.extapi.psi.StubBasedPsiElementBase;
 import com.intellij.lang.ASTNode;
 import com.intellij.lang.Language;
+import com.intellij.psi.*;
+import com.intellij.psi.impl.source.resolve.reference.ReferenceProvidersRegistry;
 import com.intellij.psi.PsiElement;
 import com.intellij.psi.PsiElementVisitor;
 import com.intellij.psi.PsiFile;
@@ -87,6 +89,19 @@ public class JetElementImplStub<T extends StubElement> extends StubBasedPsiEleme
         return visitor.visitJetElement(this, data);
     }
 
+    @Override
+    public PsiReference getReference() {
+        PsiReference[] references = getReferences();
+        if (references.length == 1) return references[0];
+        else return null;
+    }
+
+    @NotNull
+    @Override
+    public PsiReference[] getReferences() {
+        return ReferenceProvidersRegistry.getReferencesFromProviders(this, PsiReferenceService.Hints.NO_HINTS);
+    }
+
     @NotNull
     protected <PsiT extends JetElementImplStub<?>, StubT extends StubElement> List<PsiT> getStubOrPsiChildrenAsList(
             @NotNull JetStubElementType<StubT, PsiT> elementType