📄 nulldeltalistener.java
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package com.hnjchina.example.treeviewer;
public class NullDeltaListener implements IDeltaListener {
protected static NullDeltaListener soleInstance = new NullDeltaListener();
public static NullDeltaListener getSoleInstance() {
return soleInstance;
}
/*
* @see IDeltaListener#add(DeltaEvent)
*/
public void add(DeltaEvent event) {}
/*
* @see IDeltaListener#remove(DeltaEvent)
*/
public void remove(DeltaEvent event) {}
}
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