code: def test_train_and_eval(self):
      self._model_dir = self._base_model_dir + "/" + "dasalc"
      with flagsaver.flagsaver(
          train_input_pattern=self._data_file,
          eval_input_pattern=self._data_file,
          model_dir=self._model_dir,
          batch_size=16,
          hidden_layer_dims=64,
          num_attention_layers=1,
          num_attention_heads=1,
          list_size=100,
          num_features=3,
          num_train_steps=10,
      ):
          dasalc.train_and_eval()
  
file_path: ranking/tensorflow_ranking/research/dasalc_test.py
imports: import os
  from absl import flags
  from absl.testing import flagsaver
  from absl.testing import parameterized
  import tensorflow
  from google.protobuf import text_format
  from tensorflow_ranking.research import dasalc
  from tensorflow_serving.apis import input_pb2
label_desc: Use image node_id 3 for calling the TFRankingDASALCTest obj's underlying member method code with example usage: obj.test_train_and_eval() without return types