Hiding (cancel) Android Toast Notifications and prevent queue-up

In the Android version of my app I display a lot of Android Toast notifications using:

Ti.UI.createNotification({ 
    message: "MESSAGE", 
    duration: Ti.UI.NOTIFICATION_DURATION_LONG, 
    gravity: 17 // Gravity.CENTER 
}).show();

as you can see, I use the NOTIFICATION_DURATION_LONG. But when I perform another action which triggers another toast notification, while the previous notification is still being shown, the subsequent notifications get queued-up and eventually displayed one after the other. To avoid this, I've tried other approaches like keeping a single version of the notification, and calling:

notification.setMessage("MESSAGE 2");
notification.show();

which doesn't seem to work.

Also tried holding one global instance variable to hold the notification object, doing the below:

var notification = null;
 
function showToast (text) {
    if(notification){
        notification.hide();
    }
    notification = Ti.UI.createNotification({ 
        message: text, 
        duration: Ti.UI.NOTIFICATION_DURATION_LONG, 
        gravity: 17 // Gravity.CENTER 
    });
 
    notification.show();
}

But that doesn't seem to prevent the queueing-up of the toast notifications as well.

Can someone help me find a way using which I can hide an existing toast notification???

Thanks and Regards.