code: @Trivial
      public static String trim(String original) {
          if (original == null) {
              return null;
          }
          String result = original.trim();
          if (result.isEmpty()) {
              return null;
          }
          return result;
      }
docs: Calls {@code java.lang.String.trim()} on the provided value.
  
  @param original
  @return {@code null} if {@code original} is {@code null} or empty after the {@code java.lang.String.trim()} operation.
  Otherwise returns the trimmed result.