markAsEnabled method
Enables the control. This means the control will be included in validation checks and the aggregate value of its parent. Its status is re-calculated based on its value and its validators.
If the control has children, all children will be enabled.
Implementation
void markAsEnabled({bool updateParent = true, bool emitEvent = true}) {
_status = VALID;
_forEachChild(
// Only set self, so that children don't try to update their parent,
// and thus create a loop of updates.
(c) => c.markAsEnabled(updateParent: false, emitEvent: emitEvent));
updateValueAndValidity(onlySelf: true, emitEvent: emitEvent);
_updateAncestors(updateParent, emitEvent);
_disabledChanges.add(false);
}