Variable getMetadata`Const` `Api` `Param`

getMetadata: EndpointGeneric<
    { targetUserId?: number },
    {
        displayName: string;
        frequentFriendSortRollout: number;
        isFriendsFilterBarEnabled: boolean;
        isFriendsPageSortExperimentEnabled: boolean;
        isFriendsUserDataStoreCacheEnabled: boolean;
        userName: string;
    },
    undefined,
> = ...