} else { throw new RuntimeException("Unable to remove the item because the data model it is not an instance of MutableComboBoxModel."); }
else throw new RuntimeException("Unable to remove the item because the data " + "model it is not an instance of " + "MutableComboBoxModel.");
  public void removeItem(Object element)  {	if(dataModel instanceof MutableComboBoxModel) {    ((MutableComboBoxModel) dataModel).removeElement(element);	} else {		throw new RuntimeException("Unable to remove the item because the data model it is not an instance of MutableComboBoxModel.");	}  }