code: @GwtIncompatible // reflection
    public static Field getField(Enum<?> enumValue) {
      Class<?> clazz = enumValue.getDeclaringClass();
      try {
        return clazz.getDeclaredField(enumValue.name());
      } catch (NoSuchFieldException impossible) {
        throw new AssertionError(impossible);
      }
    }
docs: Returns the {@link Field} in which {@code enumValue} is defined. For example, to get the {@code
  Description} annotation on the {@code GOLF} constant of enum {@code Sport}, use {@code
  Enums.getField(Sport.GOLF).getAnnotation(Description.class)}.
  
  @since 12.0