### Question:
LengthUnitsProvider extends AbstractUnitsProvider<Length> { @Override public String toShortLabelString(Length obj) { return obj.toShortLabelString(); } LengthUnitsProvider(); @Override T convert(Class<T> desiredType, Length source); @Override T fromUnitsAndMagnitude(Class<T> type, Number magnitude); @Override Class<? extends Length> getDisplayClass(Length value); @Override String getLongLabel(Class<? extends Length> type, boolean plural); @Override String getSelectionLabel(Class<? extends Length> type); @Override String getShortLabel(Class<? extends Length> type, boolean plural); @Override Class<Length> getSuperType(); @Override String toShortLabelString(Length obj);  }### Answer:
@Test public void testToFromShortLabelString() { LengthUnitsProvider units = new LengthUnitsProvider(); Meters input = new Meters(827893745.34785384e45); String str = units.toShortLabelString(input); Length output = units.fromShortLabelString(str); Assert.assertEquals(input, output); }