docs: public static boolean isWebpHeader(
        final byte[] imageHeaderBytes,
        final int offset,
        final int headerSize) {
      return headerSize >= SIMPLE_WEBP_HEADER_LENGTH &&
          matchBytePattern(imageHeaderBytes, offset, WEBP_RIFF_BYTES) &&
          matchBytePattern(imageHeaderBytes, offset + 8, WEBP_NAME_BYTES);
    }