code: public function asShortLength($value, $decimals = null, $options = [], $textOptions = [])
      {
          return $this->formatUnit(self::UNIT_LENGTH, self::FORMAT_WIDTH_SHORT, $value, null, null, $decimals, $options, $textOptions);
      }
docs: Formats the value as a length in human readable form for example `12 m`.
  This is the short form of [[asLength]].
  
  Check properties [[baseUnits]] if you need to change unit of value as the multiplier
  of the smallest unit and [[systemOfUnits]] to switch between [[UNIT_SYSTEM_METRIC]] or [[UNIT_SYSTEM_IMPERIAL]].
  
  @param float|int $value value to be formatted.
  @param int $decimals the number of digits after the decimal point.
  @param array $options optional configuration for the number formatter. This parameter will be merged with [[numberFormatterOptions]].
  @param array $textOptions optional configuration for the number formatter. This parameter will be merged with [[numberFormatterTextOptions]].
  @return string the formatted result.
  @throws InvalidArgumentException if the input value is not numeric or the formatting failed.
  @throws InvalidConfigException when INTL is not installed or does not contain required information.
  @see asLength
  @since 2.0.13
  @author John Was <janek.jan@gmail.com>