Allow Event Registration logging.

Author: kevzlou7979

gwt-material/src/main/java/gwt/material/design/client/js/Window.java

@@ -23,6 +23,7 @@
 import com.google.gwt.event.shared.HandlerRegistration;
 import gwt.material.design.client.base.DeferredPrompt;
 import gwt.material.design.jquery.client.api.Functions;
+import gwt.material.design.jscore.client.api.core.Element;
 import jsinterop.annotations.JsMethod;
 import jsinterop.annotations.JsType;
 
@@ -38,7 +39,7 @@ public static native boolean matchMedia(String query) /*-{
     public static native MediaQueryList getMediaQueryList(String query) /*-{
         return $wnd.window.matchMedia(query);
     }-*/;
-    
+
     @JsMethod(namespace = "window")
     public static native void addEventListener(String eventName, Functions.Func1<Object> event);
 
@@ -48,6 +49,14 @@ public static native MediaQueryList getMediaQueryList(String query) /*-{
     @JsMethod(namespace = "window")
     public static native String unescape(String param);
 
+    public static native void logWindowEvents() /*-{
+        console.log($wnd.jQuery._data($wnd, "events"));
+    }-*/;
+
+    public static native void logEventRegistration(Element element) /*
+        console.log($wnd.jQuery._data(element, "events"));
+    */;
+
     @JsMethod
     public static native DeferredPrompt deferredPrompt();