crossAxisPosition property Null safety
final
The distance to the hit point in the axis opposite the SliverConstraints.axis.
If the cross axis is horizontal (i.e. the
SliverConstraints.axisDirection is either AxisDirection.down or
AxisDirection.up), then the crossAxisPosition is a distance from the
left edge of the sliver. If the cross axis is vertical (i.e. the
SliverConstraints.axisDirection is either AxisDirection.right or
AxisDirection.left), then the crossAxisPosition is a distance from the
top edge of the sliver.
This is always a distance from the left or top of the parent, never a distance from the right or bottom.
Implementation
final double crossAxisPosition;