docs: private static boolean skipWhitespaceAndCommas(Buffer buffer) throws EOFException {
      boolean commaFound = false;
      while (!buffer.exhausted()) {
        byte b = buffer.getByte(0);
        if (b == ',') {
          // Consume ','.
          buffer.readByte();
          commaFound = true;
        } else if (b == ' ' || b == '\t') {
          // Consume space or tab.
          buffer.readByte();
        } else {
          break;
        }
      }
      return commaFound;
    }