Message in Chinese (Simplified) (中文(简体))
接收活动“<var>X</var>”为返回值指定了一个 Null 值,而该值对返回类型“<var>Type Name</var>”无效。
Unlocalized message
Receive activity '<var>X</var>' has a null specified for return value which is invalid for the return type '<var>Type Name</var>'.
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