function hasBlankLinesBetween(firstToken, secondToken) {
			const firstTokenLine = firstToken.loc.end.line;
			const secondTokenLine = secondToken.loc.start.line;

			if (
				firstTokenLine === secondTokenLine ||
				firstTokenLine === secondTokenLine - 1
			) {
				return false;
			}

			for (
				let line = firstTokenLine + 1;
				line < secondTokenLine;
				++line
			) {
				if (!tokenInfo.firstTokensByLineNumber.has(line)) {
					return true;
				}
			}

			return false;
		}
Check whether there are any blank (whitespace-only) lines between
two tokens on separate lines.
@param {Token} firstToken The first token.
@param {Token} secondToken The second token.
@returns {boolean} `true` if the tokens are on separate lines and
  there exists a blank line between them, `false` otherwise.