I will see a comments section like so:

@Bob Please post the getX() method - Sue 1 hour ago  

@Sue Ok, just did that - Bob 55 mins ago  

@Bob Also the getY() method - Sue 52 mins ago  

@Sue Ok, it's there now, too - Bob 43 mins ago  

@Bob It looks like there is a problem in getY(), try using an int. - Sue 40 mins ago  

@Sue That seems to fix it, thanks. - Bob 35 mins ago

In the case here where there is only 2 people involved, it is necessary (or beneficial) to use the @Bob and @Sue?