@Override public void dispose() { super.dispose(); if (key1InputComposite != null && key1InputComposite.getVerificationDisplayHandler() != null) { key1InputComposite.getVerificationDisplayHandler().dispose(); } if (key2InputComposite != null && key2InputComposite.getVerificationDisplayHandler() != null) { key2InputComposite.getVerificationDisplayHandler().dispose(); } }