Creates a sender used to send messages to the given address. The address must be set.
@param address The target address to attach to, must not be {@code null}
@param options The options for this sender.
@param completionHandler The handler called with the sender, once opened
@return the client.
Creates a sender used to send messages to the given address. The address must be set.
@param address The target address to attach to, must not be {@code null} @param options The options for this sender. @param completionHandler The handler called with the sender, once opened @return the client.