docstr: Unit test check model 1
code: def test_check_model_1(self):
      """
      Unit test check model 1
      """
      model = lambda: None
      model.predict = types.MethodType(self.predict, model)
      _case, _classes = check_model(model)
      assert _case == "regression"
      assert _classes is None
  
imports: import unittest
  import pytest
  import pandas
  import numpy
  import category_encoders
  from shapash.utils.check import check_preprocessing, check_model, check_label_dict, check_mask_params, check_y, check_contribution_object, check_preprocessing_options, check_postprocessing, check_consistency_model_features, check_consistency_model_label, check_additional_data
  from sklearn.compose import ColumnTransformer
  import sklearn.preprocessing
  import types
  import sklearn.ensemble
  import sklearn.svm
  import sklearn.linear_model
  import xgboost
  import lightgbm
  import catboost
label_desc: Use image node_id 3 for calling the TestCheck obj's underlying member method code with example usage: obj.test_check_model_1() without return types