@Override
	public void removeActionListener(ActionListener l) {
		actionListeners.remove(l);
	}
Returns true if the combobox contains the given item.
@param item the item to check
@return true if the combobox contains the given item.
Ghidra/Framework/Docking/src/main/java/docking/widgets/combobox/GhidraComboBox.java