src/vs/editor/common/services/textResourceConfigurationService.ts/TextResourceConfigurationService/_getValue
class TextResourceConfigurationService:	private _getValue<T>(resource: URI | undefined, position: IPosition | null, section: string | undefined): T {
		const language = resource ? this.getLanguage(resource, position) : undefined;
		if (typeof section === 'undefined') {
			return this.configurationService.getValue<T>({ resource, overrideIdentifier: language });
		}
		return this.configurationService.getValue<T>(section, { resource, overrideIdentifier: language });
	}