src/vs/editor/common/languages/supports/languageBracketsConfiguration.ts/OpeningBracketKind/constructor
class OpeningBracketKind:	constructor(
		config: LanguageBracketsConfiguration,
		bracketText: string,
		public readonly openedBrackets: ReadonlySet<ClosingBracketKind>
	) {
		super(config, bracketText);
	}