public interface UnixChannel extends Channel
Channel揭露只在UNIX像系统存在的操作。 
      Channel.Unsafe| Modifier and Type | Method and Description | 
|---|---|
FileDescriptor |  
           fd() 
             
             返回此  Channel使用的FileDescriptor 。 
             |  
          
alloc, bytesBeforeUnwritable, bytesBeforeWritable, closeFuture, config, eventLoop, flush, id, isActive, isOpen, isRegistered, isWritable, localAddress, metadata, parent, pipeline, read, remoteAddress, unsafeattr, hasAttrbind, bind, close, close, connect, connect, connect, connect, deregister, deregister, disconnect, disconnect, newFailedFuture, newProgressivePromise, newPromise, newSucceededFuture, voidPromise, write, write, writeAndFlush, writeAndFlushFileDescriptor fd()
Channel使用的FileDescriptor 。 
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