src/vs/workbench/services/extensions/electron-browser/extensionService.ts/ExtensionService/_startExtensionHost
class ExtensionService:	private _startExtensionHost(extensionHostManager: IExtensionHostManager, _extensions: IExtensionDescription[]): void {
		const extensions = this._filterByExtensionHostManager(_extensions, extensionHostManager);
		extensionHostManager.start(extensions.map(extension => extension.identifier));
	}