def getSpanDurations(self, time_stamp, service_name, rpc_name):
    """
    Given a time stamp, server service name, and rpc name, fetch all of the client services calling in paired
    with the lists of every span duration (list<i64>) from the server to client. The lists of span durations
    include information on call counts and mean/stdDev/etc of call durations.

    The three arguments specify epoch time in microseconds, server side service name and rpc name. The return maps
    contains the key - client_service_name and value - list<span_durations>.

    Parameters:
     - time_stamp
     - service_name
     - rpc_name
    """
    self.send_getSpanDurations(time_stamp, service_name, rpc_name)
    return self.recv_getSpanDurations()
Given a time stamp, server service name, and rpc name, fetch all of the client services calling in paired
    with the lists of every span duration (list<i64>) from the server to client. The lists of span durations
    include information on call counts and mean/stdDev/etc of call durations.

    The three arguments specify epoch time in microseconds, server side service name and rpc name. The return maps
    contains the key - client_service_name and value - list<span_durations>.

    Parameters:
     - time_stamp
     - service_name
     - rpc_name