src/vs/editor/common/model/bracketPairsTextModelPart/bracketPairsTree/tokenizer.ts/TextBufferTokenizer/peek
class TextBufferTokenizer:	peek(): Token | null {
		if (!this.didPeek) {
			this.peeked = this.reader.read();
			this.didPeek = true;
		}
		return this.peeked;
	}