Get an aggregate representation of all services paired with every service they call in to.
    This includes information on call counts and mean/stdDev/etc of call durations.  The two arguments
    specify epoch time in microseconds. The end time is optional and defaults to one day after the
    start time.

    Parameters:
     - start_time
     - end_time

def getDependencies(self, start_time, end_time):
    """
    Get an aggregate representation of all services paired with every service they call in to.
    This includes information on call counts and mean/stdDev/etc of call durations.  The two arguments
    specify epoch time in microseconds. The end time is optional and defaults to one day after the
    start time.

    Parameters:
     - start_time
     - end_time
    """
    self.send_getDependencies(start_time, end_time)
    return self.recv_getDependencies()