ChildActionType is an enumeration used by ChildHolder to describe what kind of event occurred when managing children. The values indicate whether a child was added, removed, or if the action is reporting its result.
| Value | Meaning |
|---|---|
add |
Signifies that a child is about to be added. The event callback can call prevent() on the ChildAction to veto the addition. |
remove |
Signifies that a child is about to be removed. The callback can veto by calling prevent(). |
result |
Indicates that the original add or remove action has completed (or been prevented). A ChildActionResult is passed to the callback so the caller can update state or run follow‑up actions. |
ChildActionType is used together with ChildAction<T> and ChildActionResult<T> to provide fine‑grained control over modifications to a ChildHolder.