getContainingFile() for light classes

compiler/jet.as.java.psi/src/org/jetbrains/jet/asJava/KotlinLightClass.java

@@ -150,4 +150,9 @@ public class KotlinLightClass extends AbstractLightClass implements JetJavaMirro
     public int hashCode() {
         return classFqName.hashCode();
     }
+
+    @Override
+    public PsiFile getContainingFile() {
+        return outermostClassOrObject.getContainingFile();
+    }
 }

compiler/jet.as.java.psi/src/org/jetbrains/jet/asJava/KotlinLightClassForPackage.java

@@ -22,6 +22,7 @@ import com.intellij.navigation.ItemPresentationProviders;
 import com.intellij.openapi.util.Comparing;
 import com.intellij.psi.PsiClass;
 import com.intellij.psi.PsiElement;
+import com.intellij.psi.PsiFile;
 import com.intellij.psi.PsiManager;
 import com.intellij.psi.impl.java.stubs.PsiJavaFileStub;
 import com.intellij.psi.util.CachedValue;
@@ -123,6 +124,11 @@ public class KotlinLightClassForPackage extends KotlinLightClassForPackageBase i
         throw new UnsupportedOperationException("This should be done byt JetIconProvider");
     }
 
+    @Override
+    public PsiFile getContainingFile() {
+        return null;
+    }
+
     @Override
     public int hashCode() {
         return hashCode;