public static String ifNotNull(final String input, final Function<String, String> stringFunction) {
		if (input == null) {
			return StringPool.EMPTY;
		}
		return stringFunction.apply(input);
	}
public static String ifNotNull(final String input, final Function<String, String> stringFunction) {
		if (input == null) {
			return StringPool.EMPTY;
		}
		return stringFunction.apply(input);
	}
public static String ifNotNull ( final String input , final Function < String , String > stringFunction ) { if ( input == null ) { return StringPool . EMPTY ; } return stringFunction . apply ( input ) ; }
Executes function on a string if not {@code null}. Otherwise returns an empty string.
Executes function on a string if not {