code: def call_this(self, x, y):
      return x + y
  
file_path: fastNLP/tests/core/utils/test_utils.py
imports: from functools import partial
  import pytest
  from fastNLP.core.utils.utils import auto_param_call, _check_valid_parameters_number, _get_fun_msg
  from fastNLP.core.metrics import Metric
label_desc: Use image node_id 3 for calling the TestAutoParamCall obj's underlying member method code with example usage: obj.call_this(x, y) and returns: unknown