async def clear_state(self, turn_context: TurnContext):
if turn_context == None:<EOL><INDENT>raise TypeError('<STR_LIT>')<EOL><DEDENT>cache_value = CachedBotState()<EOL>cache_value.hash = '<STR_LIT>'<EOL>turn_context.turn_state[self._context_service_key] = cache_value<EOL>
Clears any state currently stored in this state scope.
NOTE: that save_changes must be called in order for the cleared state to be persisted to the underlying store.

:param turn_context: The context object for this turn.
:return: None