src/vs/workbench/services/extensions/common/extensionHostManager.ts/LazyStartExtensionHostManager/_getOrCreateActualAndStart
class LazyStartExtensionHostManager:	private async _getOrCreateActualAndStart(reason: string): Promise<ExtensionHostManager> {
		if (this._actual) {
			// already created/started
			return this._actual;
		}
		const actual = this._createActual(reason);
		await actual.start([], []);
		return actual;
	}