viewportBuilder property Null safety
Builds the viewport through which the scrollable content is displayed.
A typical viewport uses the given ViewportOffset to determine which part of its content is actually visible through the viewport.
- Viewport, which is a viewport that displays a list of slivers.
- ShrinkWrappingViewport, which is a viewport that displays a list of slivers and sizes itself based on the size of the slivers.
final ViewportBuilder viewportBuilder;