mixed property Null safety

bool? mixed
final

If non-null, indicates that this subtree represents a checkbox or similar widget with a "half-checked" state or similar, and whether it is currently in this half-checked state.

This must be null when Checkbox.tristate is false, or when the widget is not a checkbox. When a tristate checkbox is fully unchecked/checked, this value shall be false.

This is mutually exclusive with checked and toggled.

Implementation

final bool? mixed;