@NotNull
  @Override
  public GrCodeReferenceElement createCodeReferenceElementFromClass(@NotNull PsiClass aClass) {
    String qualifiedName = aClass.getQualifiedName();
    if (qualifiedName == null) {
      throw new IncorrectOperationException("cannot create code reference element for class " + aClass.getText());
    }
    return createCodeReference(qualifiedName);
  }
@NotNull
  @Override
  public GrCodeReferenceElement createCodeReferenceElementFromClass(@NotNull PsiClass aClass)