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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def mutable_json_field( # pylint: disable=keyword-arg-before-vararg enforce_string=False, # type: bool enforce_unicode=False, # type: bool json=json, # type: typing.Union[types.ModuleType, typing.Any] *args, # type: typing.Any **kwargs # type: typing.Any """Mutable JSONField creator. :param enforce_string: enforce String(UnicodeText) type usage :type enforce_string: bool :param enforce_unicode: do not encode non-ascii data :type enforce_unicode: bool :param json: JSON encoding/decoding library. By default: standard json package. :return: Mutable JSONField via MutableDict.as_mutable :rtype: JSONField """

    return sqlalchemy.ext.mutable.MutableDict.as_mutable(
        JSONField(enforce_string=enforce_string, enforce_unicode=enforce_unicode, json=json, *args, **kwargs)
    )