src/vs/editor/common/languages/supports/languageBracketsConfiguration.ts/ClosingBracketKind/constructor
class ClosingBracketKind:	constructor(
		config: LanguageBracketsConfiguration,
		bracketText: string,
		/**
		 * Non empty array of all opening brackets this bracket closes.
		*/
		public readonly closedBrackets: ReadonlySet<OpeningBracketKind>
	) {
		super(config, bracketText);
	}