src/vs/editor/common/model/textModelTokens.ts/TextModelTokenization/_tokenizeOneInvalidLine
class TextModelTokenization:	private _tokenizeOneInvalidLine(builder: ContiguousMultilineTokensBuilder): number {
		if (!this._tokenizationStateStore || !this._hasLinesToTokenize()) {
			return this._textModel.getLineCount() + 1;
		}
		const lineNumber = this._tokenizationStateStore.invalidLineStartIndex + 1;
		this._updateTokensUntilLine(builder, lineNumber);
		return lineNumber;
	}