pylint/reporters/ureports/nodes.py
def append(self, child):
        """overridden to detect problems easily"""
        assert child not in self.parents()
        VNode.append(self, child)
def append(self, child):
        """overridden to detect problems easily"""
        assert child not in self.parents()
        VNode.append(self, child)
overridden to detect problems easily