code: def merge_metas(*metas):
      
      metadict = {}
      for meta in metas:
          metadict.update(meta.__dict__)
  
      metadict = {k: v for k, v in metadict.items() if not k.startswith('__')}
      return type('Meta', (object, ), metadict)
docs: Merge meta parameters.
  
      next meta has priority over current, it will overwrite attributes.
  
      :param class or None meta: class with properties.
      :return class: merged meta.