import com.jme3.asset.AssetEventListener; //导入依赖的package包/类
@Override
public void setAssetEventListener(AssetEventListener listener) {
    throw new UnsupportedOperationException("Setting the asset event listener is not allowed for ProjectAssetManager, use addAssetEventListener instead");
}
 

import com.jme3.asset.AssetEventListener; //导入依赖的package包/类
@Override
public void addAssetEventListener(AssetEventListener listener) {
    synchronized (assetEventListeners) {
        assetEventListeners.add(listener);
    }
}
 

import com.jme3.asset.AssetEventListener; //导入依赖的package包/类
@Override
public void removeAssetEventListener(AssetEventListener listener) {
    synchronized (assetEventListeners) {
        assetEventListeners.remove(listener);
    }
}
 

import com.jme3.asset.AssetEventListener; //导入依赖的package包/类
public void addAssetEventListener(AssetEventListener listener) {
}
 

import com.jme3.asset.AssetEventListener; //导入依赖的package包/类
public void removeAssetEventListener(AssetEventListener listener) {
}
 

import com.jme3.asset.AssetEventListener; //导入依赖的package包/类
public void setAssetEventListener(AssetEventListener listener) {
}
 

import com.jme3.asset.AssetEventListener; //导入依赖的package包/类
@Override
public void addAssetEventListener(AssetEventListener listener) {wraps.addAssetEventListener(listener);}
 

import com.jme3.asset.AssetEventListener; //导入依赖的package包/类
@Override
public void removeAssetEventListener(AssetEventListener listener) {wraps.removeAssetEventListener(listener);}
 

import com.jme3.asset.AssetEventListener; //导入依赖的package包/类
@Override
@Deprecated
public void setAssetEventListener(AssetEventListener listener) {wraps.setAssetEventListener(listener);}