code: private void lstPropertiesKeyPressed(java.awt.event.KeyEvent evt) {// GEN-FIRST:event_lstPropertiesKeyPressed
  		int code = evt.getKeyCode();
  		if (code == KeyEvent.VK_DELETE) {
  			deleteMappingItem();
  		}
  	}
docs: GEN-LAST:event_lstPropertiesMouseReleased