builder property

RefreshControlIndicatorBuilder builder

A builder that's called as this sliver's size changes, and as the state changes.

A default simple Twitter-style pull-to-refresh indicator is provided if not specified.

Can be set to null, in which case nothing will be drawn in the overscrolled space.

Will not be called when the available space is zero such as before any overscroll.


final RefreshControlIndicatorBuilder builder