Interface QueuedNotification

interface QueuedNotification {
    message: {
        jsonrpc: "2.0";
        method: string;
        params?: {
            _meta?: {
                "io.modelcontextprotocol/related-task"?: { taskId: string };
                progressToken?: string | number;
                [key: string]: unknown;
            };
            [key: string]: unknown;
        };
    };
    timestamp: number;
    type: "notification";
}