Method isFractionUnit

base/src/main/java/net/time4j/Duration.java:3443–3448

(IsoUnit unit)

    }

    private boolean isFractionUnit(IsoUnit unit) {

        char symbol = unit.getSymbol();
        return ((symbol >= '1') && (symbol <= '9'));

    }

    @SuppressWarnings("unchecked")
    private static <T> T cast(Object obj) {