code: def fetch_backpressure(self, cluster, metric, topology, component, instance, \
      timerange, is_max, environ=None):
      '''
      :param cluster:
      :param metric:
      :param topology:
      :param component:
      :param instance:
      :param timerange:
      :param is_max:
      :param environ:
      :return:
      '''
      pasf fetch_backpressure(self, cluster, metric, topology, component, instance, \
      timerange, is_max, environ=None):
      '''
      :param cluster:
      :param metric:
      :param topology:
      :param component:
      :param instance:
      :param timerange:
      :param is_max:
      :param environ:
      :return:
      '''
      pass
docs: :param cluster:
      :param metric:
      :param topology:
      :param component:
      :param instance:
      :param timerange:
      :param is_max:
      :param environ:
      :return: