src/main/comments.js/handleForComments
function handleForComments(enclosingNode, precedingNode, comment) {
  if (
    enclosingNode &&
    (enclosingNode.type === "ForInStatement" ||
      enclosingNode.type === "ForOfStatement")
  ) {
    addLeadingComment(enclosingNode, comment);
    return true;
  }
  return false;
}