src/language-js/printer-estree.js/returnArgumentHasLeadingComment
function returnArgumentHasLeadingComment(options, argument) {
  if (hasLeadingOwnLineComment(options.originalText, argument, options)) {
    return true;
  }

  if (hasNakedLeftSide(argument)) {
    let leftMost = argument;
    let newLeftMost;
    while ((newLeftMost = getLeftSide(leftMost))) {
      leftMost = newLeftMost;

      if (hasLeadingOwnLineComment(options.originalText, leftMost, options)) {
        return true;
      }
    }
  }

  return false;
}