Method format2Digits

base/src/main/java/net/time4j/PlainDate.java:2128–2141

(
        StringBuilder sb,
        int value
    )

    }

    private static void format2Digits(
        StringBuilder sb,
        int value
    ) {

        sb.append('-');

        if (value < 10) {
            sb.append('0');
        }

        sb.append(value);

    }

    private static void registerExtensions(TimeAxis.Builder<IsoDateUnit, PlainDate> builder) {