public void removeProcessor(SceneProcessor processor) {
        if (processor == null) {
            throw new IllegalArgumentException("Processor cannot be null.");
        }
        processors.remove(processor);
        processor.cleanup();
    }
Removes a {@link SceneProcessor} from this ViewPort.

<p>The processor will no longer receive events occurring to this ViewPort.

@param processor The processor to remove

@see SceneProcessor
jme3-core/src/main/java/com/jme3/renderer/ViewPort.java