src/vs/editor/common/languages/supports/richEditBrackets.ts/RichEditBracket/constructor
class RichEditBracket:	constructor(languageId: string, index: number, open: string[], close: string[], forwardRegex: RegExp, reversedRegex: RegExp) {
		this.languageId = languageId;
		this.index = index;
		this.open = open;
		this.close = close;
		this.forwardRegex = forwardRegex;
		this.reversedRegex = reversedRegex;
		this._openSet = RichEditBracket._toSet(this.open);
		this._closeSet = RichEditBracket._toSet(this.close);
	}