class_docstr: Class to test that each validator test gets run
  
  We check this in the module teardown function
code: def validate_second(self, obj, param):
      self.run_tests.append("second")
  
file_path: nibabel/nibabel/tests/test_api_validators.py
imports: import os
  import pytest
label_desc: Use image node_id 3 for calling the TestRunAllTests obj's underlying member method code with example usage: obj.validate_second(obj, param) without return types