GWT - Send a message from the server to the client?

Good afternoon,

I was curious how I would properly send a message from the server to the client? Here is my scenario:

Client A - Modifies User1 from the GUI and pushes the data to the server

Client B - Is looking at User1 and needs to be notified that there are changes that have been made

So the server needs to send a message to all clients that the user has changed.

What is the best way to solve this?

Thanks,

Joshua

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