public Comment updateComment(Node node, Comment comment, String
        content) throws SkyVaultServiceException update the content of the specified
      comment.
    Parameters
- Node node
 - The node with the specified comment.
 - Comment comment
 - The comment to update.
 - String content
 - A string representing the new content.
 
Returns
Returns the Comment that was updated.
Exception
Throws an SkyVaultServiceException if the operation cannot be completed.
Example
    CommentService cs = session.getServiceRegistry().getCommentService();
    
    Node node = getTestNode(session, "ClimbingVolcanoes.JPG");
    
    if (node != null) {
    
        // getComments
        List<Comment> comments = cs.getComments(node);
    
        for (Comment c : comments) {
            Log.d(TAG, "Comment:");
            Log.d(TAG, "canDelete:" + c.canDelete());
            Log.d(TAG, "canEdit:" + c.canEdit());
            Log.d(TAG, "Content:" + c.getContent());
            Log.d(TAG, "createdBy:" + c.getCreatedBy());
            Log.d(TAG, "creationTime:"
                  + c.getCreationTime().getTime().toString());
            Log.d(TAG, "identifier:" + c.getIdentifier());
            Log.d(TAG, "modificationTime:"
                  + c.getModificationTime().getTime().toString());
            Log.d(TAG, "name:" + c.getName());
            Log.d(TAG, "title:" + c.getTitle());
            Log.d(TAG, "isEdited:" + c.isEdited());
            Log.d(TAG, "--------");
        }
    
        try {
    
            // addComment
            Comment comment = cs.addComment(node, "This is my very interesting comment!");
    
            // updateComment
            comment = cs.updateComment(node, comment, "This is my updated comment!");
    
            // deleteComment
            cs.deleteComment(node, comment);
    
        }
        catch(AlfrescoServiceException e){
            Log.d(TAG, "Exception: " + e.toString());
        }
    }