src/vs/platform/configuration/common/configurationRegistry.ts/ConfigurationRegistry/registerConfigurations
class ConfigurationRegistry:	public registerConfigurations(configurations: IConfigurationNode[], validate: boolean = true): void {
		const properties = this.doRegisterConfigurations(configurations, validate);

		contributionRegistry.registerSchema(resourceLanguageSettingsSchemaId, this.resourceLanguageSettingsSchema);
		this._onDidSchemaChange.fire();
		this._onDidUpdateConfiguration.fire({ properties });
	}