viewportBuilder property

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.

See also:

• 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.