libraries/botbuilder-core/botbuilder/core/turn_context.py
def has(self, key: str) -> bool:
        """
        Returns True is set() has been called for a key. The cached value may be of type 'None'.
        :param key:
        :return:
        """
        if key in self._services:
            return True
        return False
def has(self, key: str) -> bool:
        """
        Returns True is set() has been called for a key. The cached value may be of type 'None'.
        :param key:
        :return:
        """
        if key in self._services:
            return True
        return False
Returns True is set() has been called for a key. The cached value may be of type 'None'.
        :param key:
        :return: