# Method signature MeetMainStageClient.unloadSidePanel

Closes the side panel iframe. Note that side panel add-on state isn't retained
within Meet when the method is called. If the side panel iframe is opened
again, for instance using a call to
[`loadSidePanel`](https://developers.google.com/workspace/meet/add-ons/reference/websdk/addon_sdk.meetmainstageclient.loadsidepanel),
the side panel iframe source URL is set to its original value from the
[add-on manifest](https://developers.google.com/workspace/meet/add-ons/guides/deploy-add-on#manifest).
It's up to the add-on to persist any add-on state in the add-on backend
before this method is called.

## Signature

    unloadSidePanel(): Promise<void>;

## Details

| Optional | No |
|---|---|

## Returns

`Promise<void>`