code: def forward(
      self, input_graph, e1_emb, rel_emb, all_node_emb, multi_label=None
  ):
      # Cannot inherit from the base class ClassifierLayerBase and
      # ClassifierBase because the forward(...) arguments are inconsistent.
      # rel_emb cannot be `None`
      raise NotImplementedError()
  
imports: from __future__ import absolute_import
  from torch import nn
label_desc: Use image node_id 2 for calling the KGCompletionBase obj's underlying member method code with example usage: obj.forward(input_graph, e1_emb, rel_emb, all_node_emb, multi_label) without return types