import org.apache.storm.spout.ISpoutOutputCollector; //导入依赖的package包/类
public static <T extends IRichSpout> T open(Map config, T spout, TopologyContext context, ISpoutOutputCollector emitter) {
    spout.open(config, context, new SpoutOutputCollector(emitter));
    return spout;
}
 

import org.apache.storm.spout.ISpoutOutputCollector; //导入依赖的package包/类
/**
 * Not used, but here to comply to SpoutOutputCollector interface.
 * @param delegate not used.
 */
public MockSpoutOutputCollector(final ISpoutOutputCollector delegate) {
    super(delegate);
}