"scroll" will execute when the user scrolls the tile with the scroll wheel.
scroll((event) => {
    example_event = {
        from: 'wheel', // where was the command sent from. Can be 'wheel' 'otto' or 'debugger'
        scroll: 100 // amount of scroll
    }
});
event: Event containing details about the origin of the scroll and the amount. See example_event in the above example.
