boundaryMargin property
A margin for the visible boundaries of the child.
Any transformation that results in the viewport being able to view outside of the boundaries will be stopped at the boundary. The boundaries do not rotate with the rest of the scene, so they are always aligned with the viewport.
To produce no boundaries at all, pass infinite EdgeInsets, such as
EdgeInsets.all(double.infinity).
No edge can be NaN.
Defaults to EdgeInsets.zero, which results in boundaries that are the
exact same size and position as the child.
Implementation
final EdgeInsets boundaryMargin;