actions property
The (optional) set of actions that are displayed at the bottom of the dialog.
Typically this is a list of TextButton widgets.
These widgets will be wrapped in a ButtonBar, which introduces 8 pixels of padding on each side.
If the title is not null but the content
is null, then an extra 20
pixels of padding is added above the ButtonBar to separate the title
from the actions.
Implementation
final List<Widget>? actions;