[angular/css] WEB-73804 'Stub type is null for the element type: JS:OBJECT_LITERAL_EXPRESSION' error

GitOrigin-RevId: 6311e961ddfd27f58e456c08eea8f4dc93b40c1f

Author: piotrtomiak

Angular/src/org/angular2/entities/source/Angular2SourceUtil.kt

@@ -58,7 +58,7 @@ object Angular2SourceUtil {
       template.withGreenStubOrAst(
         { stub ->
           for (el in stub.childrenStubs) {
-            if (el.stubType === Angular2HtmlStubElementTypes.NG_CONTENT_SELECTOR) {
+            if (el.elementType === Angular2HtmlStubElementTypes.NG_CONTENT_SELECTOR) {
               result.add((el.psi as Angular2HtmlNgContentSelector).selector)
             }
           }

Angular/src/org/angular2/lang/metadata/psi/MetadataElement.kt

@@ -11,6 +11,7 @@ import com.intellij.psi.impl.FakePsiElement
 import com.intellij.psi.stubs.IStubElementType
 import com.intellij.psi.stubs.PsiFileStubImpl
 import com.intellij.psi.stubs.StubElement
+import com.intellij.psi.tree.IElementType
 import org.angular2.lang.metadata.stubs.MetadataElementStub
 
 abstract class MetadataElement<Stub : MetadataElementStub<*>>(private val myStub: Stub) : FakePsiElement(), StubBasedPsiElement<Stub> {
@@ -39,10 +40,14 @@ abstract class MetadataElement<Stub : MetadataElementStub<*>>(private val myStub
     return TextRange.EMPTY_RANGE
   }
 
-  override fun getElementType(): IStubElementType<*, *> {
+  override fun getElementType(): IStubElementType<*, *>? {
     return myStub.stubType
   }
 
+  override fun getIElementType(): IElementType? {
+    return myStub.elementType
+  }
+
   override fun getStub(): Stub {
     return myStub
   }