}
public boolean removeComment(String cellRef) {
CTCommentList lst = comments.getCommentList();
if(lst != null) for(int i=0; i < lst.sizeOfCommentArray(); i++) {
CTComment comment = lst.getCommentArray(i);
if (cellRef.equals(comment.getRef())) {
lst.removeComment(i);
if(commentRefs != null) {
commentRefs.remove(cellRef);
}