Getting reference of Session object

[MaximBG]

I need reference of Session object. Currently I achieved this goal by overriding SessionLauncher as shown below - I get Session via "onCreated" callback, but I think, that I missing something and I believe, that there should be another way. So what I missed?

export class TTLauncher extends SessionLauncher {
  constructor(config: ISessionDescription, private sessionType: new (config: IJsFixConfig) => FixSession, private onCreated: (session: FixSession) => void) {
    super(config, null, loggerFactory)
  }

  protected override makeFactory(config: IJsFixConfig): EngineFactory {
    return {
      makeSession: () => {
        const session = new this.sessionType(config)
        this.onCreated(session)
        return session
      },
    }
  }
}