slyverin library Null safety
- RenderSliver which lays out a RenderBox and a RenderSliver so that the box stays visible at the leading visible edge of this sliver until the sliver completely scrolls of. The box and the sliver are laid out one after the other like in a list.
- A sliver which pins its child to the start of the viewport and animates it over the duration of the scrollExtent.
- Metrics for a SliverAnimatedBoxWidgetBuilder which allow it to animate its Widgets when the scroll position changes.
- A sliver with sticky header which stays at the top of the viewport until the sliver scrolls of completely. The header must be a box and the body a sliver.
- Parent data for children of RenderSliverStickyHeader.