import io.netty.channel.ChannelMetadata; //导入依赖的package包/类
@Override
public ChannelMetadata metadata() {
    return null;
}
 

import io.netty.channel.ChannelMetadata; //导入依赖的package包/类
@Override
public ChannelMetadata metadata() {
	return metadata;
}
 

import io.netty.channel.ChannelMetadata; //导入依赖的package包/类
@Override
public ChannelMetadata metadata() {
	// TODO Auto-generated method stub
	return null;
}
 

import io.netty.channel.ChannelMetadata; //导入依赖的package包/类
@Override
public ChannelMetadata metadata() {
	return null;
}
 

import io.netty.channel.ChannelMetadata; //导入依赖的package包/类
@Override
public ChannelMetadata metadata() {
    return METADATA;
}
 

import io.netty.channel.ChannelMetadata; //导入依赖的package包/类
@Override
public ChannelMetadata metadata() {
    return DATA;
}