@JavascriptInterface
 public void trace(String arg) {
   logging.trace(arg);
 }
 @JavascriptInterface
 public void warn(String arg) {
   logging.warn(arg);
 }
 @JavascriptInterface
 public void error(String arg) {
   logging.error(arg);
 }
 @JavascriptInterface
 public void debug(String arg) {
   logging.debug(arg);
 }
 @JavascriptInterface
 public void info(String arg) {
   logging.info(arg);
 }
 @JavascriptInterface
 public void log(String level, String arg) {
   logging.log(level, arg);
 }
 public ApiBinding() {
   logging = KrollLogging.getDefault();
 }