off abstract method
Removes the specified handler for the specified hub method.
You must pass the exact same Function instance as was previously passed to HubConnection.on. Passing a different instance (even if the function body is the same) will not remove the handler.
methodName
The name of the method to remove handlers for.
method
The handler to remove. This must be the same Function instance as the one passed to HubConnection.on.
Implementation
void off(String methodName, [void Function(List<dynamic> args)? method]);