@Override public ChannelFuture sendFile(FileRegion region, ChannelPromise promise) { return tail.sendFile(region, promise); }
@Override public ChannelFuture sendFile(FileRegion region) { return tail.sendFile(region); }
@Override public ChannelFuture sendFile(FileRegion region, ChannelPromise promise) { return tail.sendFile(region, promise); }
@Override public ChannelFuture sendFile(FileRegion region) { return tail.sendFile(region); }