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