How to have fadein and fadeout animation ?

[1Krishna16]

I can perform all types of beatiful animation,

Is there a way in which snackbar is in a static position lets say floating at the button, now i want it to just pop on and pop off in the same place, instead of animating it from offset outside of the screen.

This feature is in the default snackbar of the flutter, but it is not much customizable,

Is it possible to achieve this? if not could you provide this feature.