code: public static List<String> unpackValues(String packedValues) {
          if (noLength(packedValues)) {
              return null;
          }
  
          final String[] values = packedValues.split(PACKED_VALUES_DELIMITER);
          return Arrays.asList(values);
      }
docs: Unpack values from <tt>packedValues</tt> using
  {@link #PACKED_VALUES_DELIMITER}.
  
  @param packedValues {@link String} the packed values, which should not
  be {@code null}
  @return <tt>{@link List}<{@link String></tt>, the unpacked strings, or
  {@code null} if {@code packedValues} is {@code null}