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return; } super.activate(); Box box = ((Box) getModel()); box.eAdapters().add(this.listener); box.addPropertyChangeListener(listener); } public void deactivate() { if (!isActive()) {
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if (!isActive()) { return; } super.deactivate(); Box box = ((Box) getModel()); box.eAdapters().remove(this.listener); box.removePropertyChangeListener(listener); } @Override public Object getAdapter(Class key) {