docs: protected boolean isSOFnMarker(int marker) {
          if (marker <= 0xC3 && marker >= 0xC0) {
              return true;
          }
  
          if (marker <= 0xCB && marker >= 0xC5) {
              return true;
          }
  
          if (marker <= 0xCF && marker >= 0xCD) {
              return true;
          }
  
          return false;
      }