UpdateRequestsRequestId.
        [Preview API] Update a symbol request by request identifier.
        :param :class:`<Request> <azure.devops.v5_0.symbol.models.Request>` update_request: The symbol request.
        :param str request_id: The symbol request identifier.
        :rtype: :class:`<Request> <azure.devops.v5_0.symbol.models.Request>`

def update_requests_request_id(self, update_request, request_id):
        """UpdateRequestsRequestId.
        [Preview API] Update a symbol request by request identifier.
        :param :class:`<Request> <azure.devops.v5_0.symbol.models.Request>` update_request: The symbol request.
        :param str request_id: The symbol request identifier.
        :rtype: :class:`<Request> <azure.devops.v5_0.symbol.models.Request>`
        """
        route_values = {}
        if request_id is not None:
            route_values['requestId'] = self._serialize.url('request_id', request_id, 'str')
        content = self._serialize.body(update_request, 'Request')
        response = self._send(http_method='PATCH',
                              location_id='ebc09fe3-1b20-4667-abc5-f2b60fe8de52',
                              version='5.0-preview.1',
                              route_values=route_values,
                              content=content)
        return self._deserialize('Request', response)