class_docstr: A mock class with implementation of abstract methods for testing.
class_docstr_tok: ["A","mock","class","with","implementation","of","abstract","methods","for","testing","."]
code: def train(self, train_data, validation_data=None, **kwargs):
      pass
  
file_path: mediapipe/mediapipe/model_maker/python/core/tasks/custom_model_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import tensorflow
  from mediapipe.model_maker.python.core.tasks import custom_model
  from mediapipe.model_maker.python.core.utils import test_util
label_desc: Use image node_id 1 for calling the MockCustomModel obj's underlying member method code with example usage: obj.train(train_data, validation_data) without return types