Position.sticky constructor
The element is positioned according to the normal flow of the document, and then offset relative to its nearest
scrolling ancestor and containing block (nearest block-level ancestor), including table-related elements, based
on the values of top, right, bottom, and left. The offset does not affect the position of any other elements.
Implementation
const factory Position.sticky({Unit? top, Unit? left, Unit? bottom, Unit? right}) = _Positioned.sticky;