code: def forward(self, x: torch.Tensor) -> torch.Tensor:
      return self.gflus(x)
  
imports: import torch
  import torch.nn
  from omegaconf import DictConfig
  from pytorch_tabular.models.common.layers import Add, Embedding1dLayer, GatedFeatureLearningUnit
  from pytorch_tabular.models.common.layers.activations import t_softmax
  from pytorch_tabular.utils import get_logger
  from ..base_model import BaseModel
label_desc: Use image node_id 4 for calling the GANDALFBackbone obj's underlying member method code with example usage: obj.forward(x) and returns: self