TreemapBreadcrumbBuilder typedef Null safety

TreemapBreadcrumbBuilder = Widget? Function(BuildContext context, TreemapTile tile, bool isCurrent)

Signature to return a widget based on the given tile.

isCurrent - Specifies whether the current tile’s descendants are in visual. For example, if we drilling down into 0 -> 1 -> 2 level, only the second level tiles will be visible, and the rest are hidden in the background.

See also:

Implementation

typedef TreemapBreadcrumbBuilder = Widget? Function(
    BuildContext context, TreemapTile tile, bool isCurrent);