Returning a deep clone enables the runtime to support the case in which multiple custom bindings share a custom binding element.

通过返回深层克隆，运行时将能够支持多个自定义绑定共用一个自定义绑定元素的情况。

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Returning a deep clone enables the runtime to support the case in which multiple custom bindings share a custom binding element.

通过返回深层克隆，运行时将能够支持多个自定义绑定共用一个自定义绑定元素的情况。

youdao