code: public static MeterValue valueOf(String value) {
  		if (isNumber(value)) {
  			return new MeterValue(Long.parseLong(value));
  		}
  		return new MeterValue(DurationStyle.detectAndParse(value));
  	}
docs: Return a new {@link MeterValue} instance for the given String value. The value may
  contain a simple number, or a {@link DurationStyle duration style string}.
  @param value the source value
  @return a {@link MeterValue} instance