@omneedia/socketcluster/sample/node_modules/rxjs/add/observable/using.d.ts

SocketCluster - A Highly parallelized WebSocket server cluster to make the most of multi-core machines/instances.

import { using as staticUsing } from '../../observable/using';
declare module '../../Observable' {
    namespace Observable {
        let using: typeof staticUsing;
    }
}