docs: private boolean isContentTypeIn(ZipInputStream stream) throws IOException {
  		boolean isContentType = false;
  		if (this.innerFile != null) {
  			final String strInner = this.innerFile.toString();
  			InputStream dataStream = null;
  			ZipEntry zipEntry = stream.getNextEntry();
  			while (zipEntry != null && dataStream == null) {
  				if (strInner.equals(zipEntry.getName())) {
  					dataStream = stream;
  				} else {
  					zipEntry = stream.getNextEntry();
  				}
  			}
  			if (dataStream != null) {
  				isContentType = isContentType(stream, zipEntry, dataStream);
  			}
  		} else {
  			isContentType = isContentType(stream, null, null);
  		}
  		return isContentType;
  	}