def _set_wait(self, request, validator_query):
        """Parses the `wait` query parameter, and sets the corresponding
        `wait` and `timeout` properties in the validator query.
        """
        wait = request.url.query.get('wait', 'false')
        if wait.lower() != 'false':
            validator_query.wait = True
            try:
                validator_query.timeout = int(wait)
            except ValueError:
                # By default, waits for 95% of REST API's configured timeout
                validator_query.timeout = int(self._timeout * 0.95)