def _parse_fields(self, query):
        """
        Parse the querystring args for fields.

        :param query: Dict of query args
        """
        field_args = {
            k: v
            for k, v in query.items() if k.startswith('fields[')
        }

        fields = {}

        for k, v in field_args.items():
            fields[k[7:-1]] = v.split(',')

        return fields
Parse the querystring args for fields.

        :param query: Dict of query args