docs: public static byte[] toByteArray(final File tmpFile) throws IOException
  	{
  		byte[] data = null;
  		if (tmpFile.exists() && !tmpFile.isDirectory())
  		{
  			try (BufferedInputStream bis = new BufferedInputStream(new FileInputStream(tmpFile));
  				ByteArrayOutputStream bos = new ByteArrayOutputStream(FileConst.KILOBYTE);)
  			{
  				StreamExtensions.writeInputStreamToOutputStream(bis, bos);
  				data = bos.toByteArray();
  			}
  		}
  		return data;
  	}