code: def forward(self, feature):
      return self.FeatureInteraction(feature)
  
imports: import torch
  from torch import nn
  from torch.nn.init import xavier_normal_
  from copy import deepcopy
  from recbole.model.init import xavier_normal_initialization
  from recbole.model.abstract_recommender import ContextRecommender
label_desc: Use image node_id 3 for calling the CrossNet obj's underlying member method code with example usage: obj.forward(feature) and returns: self