Method create

packages/platform-socket.io/adapters/io-adapter.ts:17–30

(
    port: number,
    options?: ServerOptions & { namespace?: string; server?: any },
  )

  private readonly disconnectMap = new WeakMap<Socket, Observable<any>>();

  public create(
    port: number,
    options?: ServerOptions & { namespace?: string; server?: any },
  ): Server {
    if (!options) {
      return this.createIOServer(port);
    }
    const { namespace, server, ...opt } = options;
    return server && isFunction(server.of)
      ? server.of(namespace)
      : namespace
        ? this.createIOServer(port, opt).of(namespace)
        : this.createIOServer(port, opt);
  }

  public createIOServer(port: number, options?: any): any {
    if (this.httpServer && port === 0) {