@Override
    public Class<? extends AssetCache> getCacheType(){
        // Need to override this so that textures embedded in FBX
        // don't get cached by the asset manager.
        return null;
    }
Used to load textures from image binary content.
<p>Filename is required to acquire proper type asset loader according to extension.</p>
jme3-plugins/src/fbx/java/com/jme3/scene/plugins/fbx/ContentTextureKey.java