Method __contains__

thirdparty/clientform/clientform.py:2905–2906

(self, name)

    def __getitem__(self, name):
        return self.find_control(name).value
    def __contains__(self, name):
        return bool(self.find_control(name))
    def __setitem__(self, name, value):
        control = self.find_control(name)
        try: