allowNone
⚠️ Deprecated ⚠️
This is deprecated since version 1.4.
See migrating-to-breakpoints.html#replace-adwsqueezer
---Whether to allow squeezing beyond the last child's minimum size.
If set to TRUE, the squeezer can shrink to the point where no child can be shown. This is functionally equivalent to appending a widget with 0×0 minimum size.