code: def build(self):
      self.base = UnimodalBase(self.config)
      # As the in_dim is dynamically calculated we need to copy classifier_config
      classifier_config = deepcopy(self.config.classifier)
      classifier_config.params.in_dim = self.config.text_hidden_size
      self.classifier = build_classifier_layer(classifier_config)
  
imports: import collections
  from copy import deepcopy
  import torch
  from mmf.common.registry import registry
  from mmf.models.base_model import BaseModel
  from mmf.modules.encoders import MultiModalEncoderBase
  from mmf.utils.build import build_classifier_layer
label_desc: Use image node_id 3 for calling the UnimodalText obj's underlying member method code with example usage: obj.build() without return types