Duration with closed button?

[aromka]

Why do you require to provide duration if close button is also shown?

If duration is not provided - it doesn't show the toast ... but if it's provided - it's not used anyways if close button is used ... doesn't make sense :)

Would make more sense to either use duration (if provided) with close button, or just have one option for duration - if it's null / zero - then show close button instead.

Would also be nice to have a callback function for close event.