src/vs/workbench/contrib/debug/browser/rawDebugSession.ts/RawDebugSession/start
class RawDebugSession:	async start(): Promise<void> {
		if (!this.debugAdapter) {
			return Promise.reject(new Error(nls.localize('noDebugAdapterStart', "No debug adapter, can not start debug session.")));
		}

		await this.debugAdapter.startSession();
		this.startTime = new Date().getTime();
	}