class MolecularFormulaSet implements Iterable<IMolecularFormula>, IMolecularFormulaSet, Cloneable {

    public MolecularFormulaSet() {
        components = new ArrayList<IMolecularFormula>();
    }

    public  MolecularFormulaSet();
    public  MolecularFormulaSet(IMolecularFormula formula);

}