RegistryAdminService
     extends the shared YARN Registry client with registry setup and
     (potentially asynchronous) administrative actions.See: Description
| Class | Description | 
|---|---|
| AddingCompositeService | Composite service that exports the add/remove methods. | 
RegistryAdminService
     extends the shared YARN Registry client with registry setup and
     (potentially asynchronous) administrative actions.
   MicroZookeeperService
     is a transient Zookeeper instance bound to the YARN service lifecycle.
     It is suitable for testing.
   AddingCompositeService
     extends the standard YARN composite service by making its add and remove
     methods public. It is a utility service used in parts of the codebase
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