null safety issue in anomateTo and jumpTo methods

[nishitdixit]

while using animateTo and jumpTo methods exposed from the controller it throws null check error like below:

I guess it's because the methods are not configured with fail-safe values and '!' are placed everywhere. shown in the pic below:

[anchals333]

I'm facing the same issue, this still exists in version 4.2.1 for more than a year.. any solution in future ?