code: def head(self):
      return self._head
  
imports: from collections import OrderedDict
  import torch
  import torch.nn
  from omegaconf import DictConfig
  from pytorch_tabular.models.common.layers.batch_norm import BatchNorm1d
  from ..base_model import BaseModel
  from ..common.layers import AppendCLSToken, Embedding2dLayer, TransformerEncoderBlock
label_desc: Use image node_id 4 for calling the FTTransformerModel obj's underlying member method code with example usage: obj.head() and returns: self