src/vs/workbench/api/common/extHostDebugService.ts/ExtHostDebugServiceBase/$stopDASession
class ExtHostDebugServiceBase:	public $stopDASession(debugAdapterHandle: number): Promise<void> {

		const tracker = this._debugAdaptersTrackers.get(debugAdapterHandle);
		this._debugAdaptersTrackers.delete(debugAdapterHandle);
		if (tracker && tracker.onWillStopSession) {
			tracker.onWillStopSession();
		}

		const da = this._debugAdapters.get(debugAdapterHandle);
		this._debugAdapters.delete(debugAdapterHandle);
		if (da) {
			return da.stopSession();
		} else {
			return Promise.resolve(void 0);
		}
	}