public static String diff(IChemObject first, IChemObject second) {
        IDifference diff = difference(first, second);
        if (diff == null) {
            return "";
        } else {
            return diff.toString();
        }
    }
public static String diff ( IChemObject first , IChemObject second ) { IDifference diff = difference ( first , second ) ; if ( diff == null ) { return "" ; } else { return diff . toString ( ) ; } }
Compare two {@link IChemObject} classes and return the difference as a {@link String}.

@param first  the first of the two classes to compare
@param second the second of the two classes to compare
@return a {@link String} representation of the difference between the first and second {@link IChemObject}.