code: @Deprecated
      public StringBuffer format(Object obj, StringBuffer toAppendTo,
              FieldPosition pos) {
          return mf.format(obj, toAppendTo, pos);
      }
docs: Format a TimeUnitAmount.
  @see java.text.Format#format(java.lang.Object, java.lang.StringBuffer, java.text.FieldPosition)
  @deprecated ICU 53 see {@link MeasureFormat}.