Lightning:NotificationsLibrary : Easy Way to Display Notices in Lightning

SK_LightningNotificationsNoticeDemoCmp.cmp

<aura:component implements="force:appHostable,flexipage:availableForAllPageTypes" access="global" >
    
    <lightning:notificationsLibrary aura:id="notifLib"/>
    <lightning:button name="notice" label="Display Notice" onclick="{!c.showNotice}"/>
    
</aura:component>

SK_LightningNotificationsNoticeDemoCmpController.js

({
  //available variant values are info, warning, and error. This value defaults to info.
	showNotice : function(component, event, helper) {
		component.find('notifLib').showNotice({
            "variant": "error",
            "header": "An Internal Server has occured!",
            "message": "There was a problem updating the record. Please contact your system administrator.",
            closeCallback: function() {
                $A.get('e.force:refreshView').fire();
            }
        });
	}
})