code: def _get_widget_id(self, package_name):
          
          widget_id = ""
          for app in self.get_apps_list():
              if app.package == package_name:
                  widget_id = list(app.widgets.keys())[0]
  
          return widget_id
docs: returns widget_id for given package_name does not care
          about multiple widget ids at the moment, just picks the first
  
          :param str package_name: package to check for
          :return: id of first widget which belongs to the given package_name
          :rtype: str