public interface PolicyOperations 
      Policy对象的操作。 
      int policy_type()
Policy copy()
Policy对象的副本。 
           该副本不保留该策略与任何域或对象的任何关系。 
          Policy对象的副本 
           void destroy()
Policy对象。 
           Policy对象的责任是确定是否可以被销毁。 
           Submit a bug or feature 
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