code: function isJSDoc(commentGroup) {
              const lines = commentGroup[0].value.split(astUtils.LINEBREAK_MATCHER);
  
              return commentGroup[0].type === "Block" &&
                  /^\*\s*$/u.test(lines[0]) &&
                  lines.slice(1, -1).every(line => /^\s* /u.test(line)) &&
                  /^\s*$/u.test(lines[lines.length - 1]);
          }
docs: Check a comment is JSDoc form
  @param {Token[]} commentGroup A group of comments, containing either multiple line comments or a single block comment
  @returns {boolean} if commentGroup is JSDoc form, return true