| Parameter | Description |
|---|---|
| child | AdvancedDropdownItem to be added to the children list. |
Adds the given AdvancedDropdownItem child to the children list. The child's ID will be computed based on the parent's ID and the child's name to ensure uniqueness. If you wish to use a custom ID, assign the AdvancedDropdownItem.id property on the child after calling this method.