Whether the child is enabled.
If a child is disabled, it will be ignored when looking for the child fitting the available size best.
This allows to programmatically and prematurely hide a child even if it fits in the available space.
This can be used e.g. to ensure a certain child is hidden below a certain window width, or any other constraint you find suitable.
Builder instance for fluent chaining
Deprecated: See the migration guide
Set enabled property.