Creates a sender used to send messages to the given node address. If no address (i.e null) is specified then a
sender will be established to the 'anonymous relay' and each message must specify its destination address.
@param address
The target address to attach to, or null to attach to the anonymous relay.
Creates a sender used to send messages to the given node address. If no address (i.e null) is specified then a sender will be established to the 'anonymous relay' and each message must specify its destination address.
@param address The target address to attach to, or null to attach to the anonymous relay.
@return the (unopened) sender.