src/vs/workbench/services/extensions/browser/extensionService.ts/ExtensionService/_createLocalExtensionHostDataProvider
class ExtensionService:	private _createLocalExtensionHostDataProvider(desiredRunningLocation: ExtensionRunningLocation): IWebWorkerExtensionHostDataProvider {
		return {
			getInitData: async (): Promise<IWebWorkerExtensionHostInitData> => {
				const allExtensions = await this.getExtensions();
				const localWebWorkerExtensions = this._filterByRunningLocation(allExtensions, desiredRunningLocation);
				return {
					autoStart: true,
					allExtensions: allExtensions,
					myExtensions: localWebWorkerExtensions.map(extension => extension.identifier)
				};
			}
		};
	}