code: public static double convertLength(@FloatRange(from = 0) double distance,
                                       @NonNull @TurfUnitCriteria String originalUnit) {
      return convertLength(distance, originalUnit, TurfConstants.UNIT_DEFAULT);
    }
docs: Converts a distance to the default units. Use
  {@link TurfConversion#convertLength(double, String, String)} to specify a unit to convert to.
  
  @param distance     double representing a distance value
  @param originalUnit of the distance, must be one of the units defined in
  {@link TurfUnitCriteria}
  @return converted distance in the default unit
  @since 2.2.0