anchor.diff:      vimrcConfig.pathogen.pluginNames = [ "vim-addon-nix" ];
     };
   
  +  test_vim_with_vim_addon_nix_using_plug = vim_configurable.customize {
  +    name = "vim-with-vim-addon-nix-using-plug";
  +    vimrcConfig.plug.plugins = with vimPlugins; [ vim-addon-nix ];
  +  };
  +
     test_vim_with_vim_addon_nix = vim_configurable.customize {
       name = "vim-with-vim-addon-nix";
       vimrcConfig.packages.myVimPackage.start = with vimPlugins; [ vim-addon-nix ];
  
positive.code:         let &rtp.=(empty(&rtp)?"":',')."${vimPlugins.pathogen.rtp}"
          execute pathogen#infect('${pluginsEnv}/{}')
        '');
  
        /*
         vim-addon-manager = VAM
  
negative.code:     packages ? null,
      vam ? null,
      pathogen ? null,
      plug ? null,
      customRC ? ""
    }:
  
  