code: function (name) {
          if (JOII.Config.callables.indexOf(name) !== -1) {
              return;
          }
  
          JOII.Config.callables.push(name);
      }
docs: Adds a callable method name, like __call. Only one of these is
  executed if more than one exist to prevent ambiguous behaviour.
  
  @param {string} name