environment/lib/python2.7/site-packages/IPython/core/prefilter.py
def register_checker(self, checker):
        """Register a checker instance."""
        if checker not in self._checkers:
            self._checkers.append(checker)
            self.sort_checkers()
def register_checker(self, checker):
        """Register a checker instance."""
        if checker not in self._checkers:
            self._checkers.append(checker)
            self.sort_checkers()
Register a checker instance.