src/vs/editor/common/languages/languageConfigurationRegistry.ts/getCustomizedLanguageConfig
function getCustomizedLanguageConfig(languageId: string, configurationService: IConfigurationService): LanguageConfiguration {
	const brackets = configurationService.getValue(customizedLanguageConfigKeys.brackets, {
		overrideIdentifier: languageId,
	});

	const colorizedBracketPairs = configurationService.getValue(customizedLanguageConfigKeys.colorizedBracketPairs, {
		overrideIdentifier: languageId,
	});

	return {
		brackets: validateBracketPairs(brackets),
		colorizedBracketPairs: validateBracketPairs(colorizedBracketPairs),
	};
}