src/main/java/com/github/jreddit/parser/util/CommentTreeUtils.java
public static List<CommentTreeElement> flattenCommentTree(List<CommentTreeElement> commentTree) {
        List<CommentTreeElement> target = new ArrayList<CommentTreeElement>();
        flattenCommentTree(commentTree, target);
        return target;
    }
public static List<CommentTreeElement> flattenCommentTree(List<CommentTreeElement> commentTree) {
        List<CommentTreeElement> target = new ArrayList<CommentTreeElement>();
        flattenCommentTree(commentTree, target);
        return target;
    }
Flatten the comment tree.
The original comment tree is not overwritten.

@param cs        List of comments that you get returned from one of the other methods here

@return    Flattened comment tree.