code: def test_user_enters_variables_and_max_value_imputation(df_na):
      imputer = EndTailImputer(
          imputation_method="max",
          tail="right",
          fold=2,
          variables=["Age", "Marks"],
      )
      imputer.fit(df_na)
      assert imputer.imputer_dict_ == {"Age": 82.0, "Marks": 1.8}
  
file_path: feature_engine/tests/test_imputation/test_end_tail_imputer.py
imports: import numpy
  import pandas
  import pytest
  from feature_engine.imputation import EndTailImputer
label_desc: Use image node_id 3 for calling a global function with example usage: test_user_enters_variables_and_max_value_imputation(df_na) without return types