src/vs/editor/common/model/bracketPairsTextModelPart/bracketPairsTree/parser.ts/Parser/constructor
class Parser:	constructor(
		private readonly tokenizer: Tokenizer,
		edits: TextEditInfo[],
		oldNode: AstNode | undefined,
		private readonly createImmutableLists: boolean,
	) {
		if (oldNode && createImmutableLists) {
			throw new Error('Not supported');
		}

		this.oldNodeReader = oldNode ? new NodeReader(oldNode) : undefined;
		this.positionMapper = new BeforeEditPositionMapper(edits);
	}