code: def update_args(self, override_args):
          
          Link.update_args(self, override_args)
          dry_run = override_args.get('dry_run', False)
          if self.__app is None:
              self.__app = build_gtapp(self.appname, dry_run, **self.args)
  #except:
  #                raise ValueError("Failed to build link %s %s %s" %
  #                                 (self.linkname, self.appname, self.args))
          else:
              update_gtapp(self.__app, **self.args)
docs: Update the argument used to invoke the application
  
          See help for `chain.Link` for details
  
          This calls the base class function then fills the parameters of the GtApp object