作为一个标记接口，我们认为它可以用于通知用户在可能的时候即刻释放对象。
As a marker interface, we thought it would be useful to notify users that the should eagerly release this object if possible.
避免在处理器中释放内存的最好方法是，标记或记录将要释放的对象，让程序不间断地检查是否有等待被释放的内存。
The best way to avoid freeing memory in a handler is to flag or record the objects to be freed and have the program check from time to time whether anything is waiting to be freed.
一旦这个概要文件被释放，所有的非发布版本都会被删除(除最后的获得被发布标记的概要文件之外)，导致迁移过程中使用模型中数据的丢失。
Once the profile is released, all non-released versions are deleted (except the last one which gets marked as released), resulting in the loss of data in models that were applied during migration.
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