instance method Client#onClose
Client#onClose() → undefined
Event handler that is called after an invokation to Client#close
has been called, resulting in a socket being closed. That is, if you call
Client#close
on an instance that is already closed, then this
event will not be called.
Perhaps more importantly, this event will be called if the server closes
the connection (either directly through code or otherwise).
You must implement this function in a subclass to be useful.