code: def forward(self, e1_emb, rel_emb, all_node_emb, multi_label=None):
      raise NotImplementedError()
  
imports: from __future__ import absolute_import
  from torch import nn
label_desc: Use image node_id 2 for calling the KGCompletionLayerBase obj's underlying member method code with example usage: obj.forward(e1_emb, rel_emb, all_node_emb, multi_label) without return types