Returns all documented module level variables in the module
        sorted alphabetically as a list of `pydoc.Variable`.

def variables(self):
        """
        Returns all documented module level variables in the module
        sorted alphabetically as a list of `pydoc.Variable`.
        """
        p = lambda o: isinstance(o, Variable) and self._docfilter(o)
        return sorted(filter(p, self.doc.values()))