src/vs/workbench/services/configuration/browser/configuration.ts/DefaultConfiguration/onDidUpdateConfiguration
class DefaultConfiguration:	private onDidUpdateConfiguration(properties: string[], defaultsOverrides?: boolean): void {
		this._configurationModel = undefined;
		this._onDidChangeConfiguration.fire({ defaults: this.configurationModel, properties });
		if (defaultsOverrides) {
			this.updateCachedConfigurationDefaultsOverrides();
		}
	}