docs: @Nullable
    @Override
    public final ImageFormat determineFormat(byte[] headerBytes, int headerSize) {
      Preconditions.checkNotNull(headerBytes);
  
      if (WebpSupportStatus.isWebpHeader(headerBytes, 0, headerSize)) {
        return getWebpFormat(headerBytes, headerSize);
      }
  
      if (isJpegHeader(headerBytes, headerSize)) {
        return DefaultImageFormats.JPEG;
      }
  
      if (isPngHeader(headerBytes, headerSize)) {
        return DefaultImageFormats.PNG;
      }
  
      if (isGifHeader(headerBytes, headerSize)) {
        return DefaultImageFormats.GIF;
      }
  
      if (isBmpHeader(headerBytes, headerSize)) {
        return DefaultImageFormats.BMP;
      }
  
      if (isIcoHeader(headerBytes, headerSize)) {
        return DefaultImageFormats.ICO;
      }
  
      if (isHeifHeader(headerBytes, headerSize)) {
        return DefaultImageFormats.HEIF;
      }
  
      return ImageFormat.UNKNOWN;
    }