anwendungshandbuch.py:193: RemovedInMarshmallow4Warning: The 'default' argument to fields is deprecated. Use 'dump_default' instead.
maus_version = fields.String(required=False, allow_none=True, default=_VERSION)
anwendungshandbuch.py:194: RemovedInMarshmallow4Warning: The 'default' argument to fields is deprecated. Use 'dump_default' instead.
description = fields.String(required=False, allow_none=True, default=None)
anwendungshandbuch.py:195: RemovedInMarshmallow4Warning: The 'default' argument to fields is deprecated. Use 'dump_default' instead.
direction = fields.String(required=False, allow_none=True, default=None)