connectionMethodForTransport
A MdocConnectionMethod instance that can be used to connect to this transport.
For most data transports this will return the same MdocConnectionMethod instance that was passed at construction time. However for some transports where the address to listen on is not known until the connection have been set up (for example dynamic TCP listening port assignments or when a cloud relay is in use) it will differ.
This can be passed to a remote reader for them to connect to this transport.
This cannot be read until connect has been called.