Message in Chinese (Simplified) (中文(简体))
从“<var>X</var>”调用时，重写“<var>Type Name</var>”类型的节点必须返回相同类型的非 null 值。或者，重写并更改“<var>Y</var>”，以便不访问此类型的子级。
Unlocalized message
When called from '<var>X</var>', rewriting a node of type '<var>Type Name</var>' must return a non-null value of the same type. Alternatively, override '<var>Y</var>' and change it to not visit children of this type.
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