Update bannerImpl.md

Author: DeveloperTryingToCodeLikeOtherOfThem

docs/developers/bannerImpl.md

@@ -1,8 +1,7 @@
 ## Implementation of the Warning Banners
 The implementation of the warning banners are implemented in few steps, which first are implemented in the `pushNotificationMessage` function.
 The function then pushes a new message into the stack and renders it.
-## Implementation
-Here is the implementation of `pushNotificationMessage`.
+
 ``` ts
 export function pushNotificationMessage(options: NotificationOptions): void {
     if (!notificationsInitialized) {
@@ -14,5 +13,25 @@ export function pushNotificationMessage(options: NotificationOptions): void {
         notificationMessages.push(options);
     }
 ```
+[pushNotificationMessage Implementation](https://github.com/microsoft/pxt/blob/master/skillmap/src/lib/notifications.ts#L7-L9) 
+
+It then processes into the warning notification function, a higher level function that gets passed by pushNotificationMessage. In the end, all these steps get executed by `showNotificationMsg`. And finally, gets exposed to `errorNotification` and `warningNotification.`
+
+``` ts
+function showNotificationMsg(kind: string, msg: string) {
+    pushNotificationMessage({ kind: kind, text: msg, hc: false }); // No high contrast support in skillmap
+}
+
+export function errorNotification(msg: string) {
+    pxt.tickEvent("notification.error", { message: msg })
+    debugger // trigger a breakpoint when a debugger is connected, like in U.oops()
+    showNotificationMsg("err", msg)
+}
+
+export function warningNotification(msg: string) {
+    pxt.log("warning: " + msg)
+    showNotificationMsg("warn", msg)
+}
+```
+[notification banner implementation](https://github.com/microsoft/pxt/blob/master/skillmap/src/lib/notifications.ts#L07-L20)
 
-[warning](https://github.com/microsoft/pxt/blob/master/skillmap/src/lib/notifications.ts#L7-L9)