docs: @Pure
  	public static URL makeAbsolute(File filename, URL current) {
  		if (filename != null) {
  			if (!filename.isAbsolute() && current != null) {
  				return join(current, filename);
  			}
  			try {
  				return new URL(URISchemeType.FILE.toString() + fromFileStandardToURLStandard(filename.getAbsolutePath()));
  			} catch (MalformedURLException exception) {
  				// ignore error
  			}
  		}
  		return null;
  	}