anchor.diff:  , buildPythonPackage
   , fetchPypi
   , marshmallow
  +, packaging
   , pytestCheckHook
   }:
   
  
positive.code: 
    propagatedBuildInputs = [
      marshmallow
    ];
  
    checkInputs = [
  
negative.code:       --replace '"pytest-runner",' ""
    '';
  
    pythonImportsCheck = [
      "faraday_agent_parameters_types"
      "faraday_agent_parameters_types.utils"
    ];
  
    meta = with lib; {
      description = "Collection of Faraday agent parameters types";
  