alwaysSizeToContent property
final
Determines that the overlay should always size itself to content.
Normally overlay will only size itself to content if the incoming
constraints are infinite and there is a OverlayEntry that can size
the overlay. Setting this to true will force this behavior even for
finite (but possibly loose) constraints.
Setting this to true requires an OverlayEntry that can size the overlay based on itself (OverlayEntry.canSizeOverlay set to true). If not provided an exception is thrown.
Implementation
final bool alwaysSizeToContent;