src/language-js/comments.js/handleCommentAfterArrowParams
function handleCommentAfterArrowParams(text, enclosingNode, comment, options) {
  if (!(enclosingNode && enclosingNode.type === "ArrowFunctionExpression")) {
    return false;
  }

  const index = getNextNonSpaceNonCommentCharacterIndex(
    text,
    comment,
    options.locEnd
  );
  if (text.slice(index, index + 2) === "=>") {
    addDanglingComment(enclosingNode, comment);
    return true;
  }

  return false;
}