@Override
  public PsiFileStub<?> getContainingFileStub() {
    StubBase<?> rootStub = myStubList.get(0);
    if (!(rootStub instanceof PsiFileStub)) {
      return null;
    }
    return (PsiFileStub<?>)rootStub;
  }
@Override
  public PsiFileStub<?> getContainingFileStub()