code: def __init__(self, *, margin, **kwargs):
      super().__init__()
      self.margin = margin
  
imports: from abc import ABC, abstractmethod
  from typing import Optional
  import torch
  from torch import nn
  from torch.nn import functional
  from torchbiggraph.model import match_shape
  from torchbiggraph.plugin import PluginRegistry
  from torchbiggraph.types import FloatTensorType
label_desc: Use image node_id 1 to create a new RankingLossFunction object from inherited base classes: AbstractLossFunction with example: obj = RankingLossFunction()