code: @Override
      public String asString(final String format) {
          try {
              return asString(EnglishEnums.valueOf(Format.class, format), null);
          } catch (final IllegalArgumentException ex) {
              return asString();
          }
      }
docs: Formats the structured data as described in RFC 5424.
  
  @param format The format identifier. Ignored in this implementation.
  @return The formatted String.