code: public static SerializationFormat of(String uriText) {
          uriText = Ascii.toLowerCase(requireNonNull(uriText, "uriText"));
          final SerializationFormat value = uriTextToFormats.get(uriText);
          checkArgument(value != null, "unknown serialization format: ", uriText);
          return value;
      }
docs: Returns the {@link SerializationFormat} with the specified {@link #uriText()}.
  
  @throws IllegalArgumentException if there's no such {@link SerializationFormat}