src/vs/workbench/api/common/extHostDebugService.ts/ExtHostDebugServiceBase/$acceptDebugSessionActiveChanged
class ExtHostDebugServiceBase:	public async $acceptDebugSessionActiveChanged(sessionDto: IDebugSessionDto | undefined): Promise<void> {
		this._activeDebugSession = sessionDto ? await this.getSession(sessionDto) : undefined;
		this._onDidChangeActiveDebugSession.fire(this._activeDebugSession);
	}