Class decorator used to build a schema from the decorate class.

    :param type _cls: class to decorate.
    :param kwargs: schema attributes to set.
    :rtype: type
    :return: schema class.

def buildschema(_cls=None, **kwargs):
    """Class decorator used to build a schema from the decorate class.

    :param type _cls: class to decorate.
    :param kwargs: schema attributes to set.
    :rtype: type
    :return: schema class.
    """
    if _cls is None:
        return lambda _cls: buildschema(_cls=_cls, **kwargs)

    result = build(_cls, **kwargs)

    return result