isDocComment property
bool isDocCommentfinal
   Is true if this comment is a documentation comment.
That is, that the comment is either enclosed in /** ... */ or starts with ///.
    © 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
    https://api.dartlang.org/stable/1.24.3/dart-mirrors/Comment/isDocComment.html