code: function(webViewId, eventName, jsonData){
              // getting webviewInterface object by webViewId from static map.
              var oWebViewInterface = getWebViewIntefaceObjByWebViewId(webViewId);
              if (oWebViewInterface) {
                  oWebViewInterface._onWebViewEvent(eventName, jsonData);
              }
          }
docs: On call from webView to android, this function is called from handleEventFromWebView method of WebViewInerface class