private boolean isContextManager(PyClass node) {
      final String[] contextManagerFunctionNames = {PyNames.ENTER, PyNames.EXIT};
      for (String name : contextManagerFunctionNames) {
        if (node.findMethodByName(name, false, myTypeEvalContext) == null) {
          return false;
        }
      }
      return true;
    }
private boolean isContextManager(PyClass node)