Payload for the `sendEachForMulticast` method containing only FIDs.

> [!NOTE]
> **Note:** This is a temporary interface. In the next major version, this will be renamed back to `MulticastMessage` once the old token-based `MulticastMessage` is fully deprecated and removed.

**Signature:**

    export interface FidMulticastMessage extends BaseMessage

**Extends:** [BaseMessage](https://firebase.google.com/docs/reference/admin/node/firebase-admin.messaging.basemessage#basemessage_interface)

## Properties

| Property | Type | Description |
|---|---|---|
| [fids](https://firebase.google.com/docs/reference/admin/node/firebase-admin.messaging.fidmulticastmessage#fidmulticastmessagefids) | string\[\] | A list of Firebase Installation IDs (FIDs) to target. |

## FidMulticastMessage.fids

A list of Firebase Installation IDs (FIDs) to target.

**Signature:**

    fids: string[];