def add_subsegment(self, subsegment):
        """
        Add input subsegment as a child subsegment and increment
        reference counter and total subsegments counter.
        """
        super(Segment, self).add_subsegment(subsegment)
        self.increment()
def add_subsegment ( self , subsegment ) : super ( Segment , self ) . add_subsegment ( subsegment ) self . increment ( )
Add input subsegment as a child subsegment and increment
        reference counter and total subsegments counter.