# Interface AddonCallbacks

All of the callbacks that add-ons can attach to.

## Signature

    interface AddonCallbacks

## Property signatures

| Name | Description |
|---|---|
| [`frameToFrameMessage`](https://developers.google.com/workspace/meet/add-ons/reference/websdk/addon_sdk.addoncallbacks.frametoframemessage.md) | Message sent by the add-on running in one frame to the add-on running in another frame. |