Request server versions. The callback will be invoked with the instance, server address, version string, and version string length.
When all server versions have been received, the callback is invoked with the server endpoint argument set to NULL
Example
ServerVersionCommand svc = ServerVersionCommand();
ServerVersionCommand*[] commands = { &svc };
instance.server_versions( null, commands );| command_cookie |
a cookie passed to all of the notifications from this command |
| commands |
the array containing the version commands |
|
The status of the operation |