src/vs/workbench/services/configuration/browser/configuration.ts/DefaultConfiguration/constructor
class DefaultConfiguration:	constructor(
		private readonly configurationCache: IConfigurationCache,
		environmentService: IBrowserWorkbenchEnvironmentService,
	) {
		super();
		if (environmentService.options?.configurationDefaults) {
			this.configurationRegistry.registerDefaultConfigurations([{ overrides: environmentService.options.configurationDefaults }]);
		}
	}