docs: def _from_dict(cls, _dict):
          """Initialize a MessageContext object from a json dictionary."""
          args = {}
          if 'global' in _dict:
              args['global_'] = MessageContextGlobal._from_dict(
                  _dict.get('global'))
          if 'skills' in _dict:
              args['skills'] = MessageContextSkills._from_dict(
                  _dict.get('skills'))
          return cls(**args)