The derived class that you design must have a nested template class/structure named definition (you may not change this name). The definition class has the following properties

您设计的派生类必须有一个名为 definition（可以不修改此名）的嵌套的模板类/结构。

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This structure is stored in a specification's definition, along with the design language's names, so this is the reason these must not change.

该结构存储在规范的定义中，同时存储的还有设计语言的名称，因此不能更改这些内容。

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This technique should be considered a last resort when you must avoid restarts due to a configuration change and is not recommended for most applications.

这种技术应该被视为最后的手段，对于大多数应用程序不建议使用。

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Health minister Earl Howe assured peers that information relating to private services must not carry NHS branding, and this will not change under the Health and Social Care Bill.

BBC: New police chiefs will be under-funded, peer claims

He built his campaign on a fundamental belief that change in this country must start from the ground up, not the top down.

CNN: Clinton: It is time to take back the country we love

However we must set a precedent by achieving this change through the proper DCMS channel and not just on a date-by-date vote by individual local council groups.

BBC: British Legion rejects Belfast cenotaph flags proposal