Message in Chinese (Traditional) (中文（繁體）)
屬性 '<var>Property Name</var>' 不可由屬性的 get 方法傳回 null。getter 通常應該傳回 base["<var>X</var>"]。
Unlocalized message
The property '<var>Property Name</var>' must not return null from the property's get method. Typically the getter should return base["<var>X</var>"].
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