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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def capture_event(self, event, hint=None):
 # type: (Dict[str, Any], Dict[str, Any]) -> Optional[str] """Captures an event. The return value is the ID of the event. The event is a dictionary following the Sentry v7/v8 protocol specification. Optionally an event hint dict can be passed that is used by processors to extract additional information from it. Typically the event hint object would contain exception information. """

        client, scope = self._stack[-1]
        if client is not None:
            rv = client.capture_event(event, hint, scope)
            if rv is not None:
                self._last_event_id = rv
            return rv
        return None