def METHOD_NAME(cls, serializer, s_state, **kwargs):
    """
    Deserializes a WorkflowSpec instance using the provided serializer.
    :type  serializer: :class:`SpiffWorkflow.serializer.base.Serializer`
    :param serializer: The serializer to use.
    :type  s_state: object
    :param s_state: The serialized workflow specification object.
    :type  kwargs: dict
    :param kwargs: Passed to the serializer.
    :rtype:  WorkflowSpec
    :returns: The resulting instance.
    """
    return serializer.deserialize_workflow_spec(s_state, **kwargs)