code: def __init__(self, l1, l2):
      name = "{}_plus_{}".format(l1.__name__, l2.__name__)
      super().__init__(name=name)
      self.l1 = l1
      self.l2 = l2
  
label_desc: Use image node_id 1 to create a new SumOfLosses object from inherited base classes: Loss with example: obj = SumOfLosses(l1, l2)