setDidUnderflow abstract method
- bool value
Typically called unconditionally at the start of layout with false and then later called with true when the RenderSliverMultiBoxAdaptor fails to create a child required to fill the SliverConstraints.remainingPaintExtent.
Useful for subclasses to determine whether newly added children could affect the visible contents of the RenderSliverMultiBoxAdaptor.
void setDidUnderflow(bool value);