switchInCurve property
The animation curve to use when transitioning in a new child.
This curve is applied to the given child when that property is set to a
new child. Changing switchInCurve will not affect the curve of a
transition already in progress.
The switchOutCurve is used when fading out, except that if child is
changed while the current child is in the middle of fading in,
switchInCurve will be run in reverse from that point instead of jumping
to the corresponding point on switchOutCurve.
Implementation
final Curve switchInCurve;