BoxHitTestResult.wrap constructor Null safety

Wraps result to create a HitTestResult that implements the BoxHitTestResult protocol for hit testing on RenderBoxes.

This method is used by RenderObjects that adapt between the RenderBox-world and the non-RenderBox-world to convert a (subtype of) HitTestResult to a BoxHitTestResult for hit testing on RenderBoxes.

The HitTestEntry instances added to the returned BoxHitTestResult are also added to the wrapped result (both share the same underlying data structure to store HitTestEntry instances).

See also:

• HitTestResult.wrap, which turns a BoxHitTestResult back into a generic HitTestResult.
• SliverHitTestResult.wrap, which turns a BoxHitTestResult into a SliverHitTestResult for hit testing on RenderSliver children.