@Nullable
  private PsiElement createImportedModule(String name) {
    final PsiFile file = getContainingFile();
    if (file instanceof PyFile) {
      return new PyImportedModule(this, (PyFile)file, QualifiedName.fromComponents(name));
    }
    return null;
  }
@Nullable
  private PsiElement createImportedModule(String name)