animationDuration property
Creates an object that manages the state required by TabBar and a TabBarView.
The length
must not be null or negative. Typically it's a value greater than one, i.e. typically there are two or more tabs. The length
must match TabBar.tabs's and TabBarView.children's length.
The initialIndex must be valid given length
and must not be null. If length
is zero, then initialIndex must be 0 (the default).
Implementation
final Duration? animationDuration;