Obtain the address which is to be used within sender references when sending to the given other address or none if the other address cannot be reached from this system (i.e. no means of communication known; no attempt is made to verify actual reachability).

Address GetExternalAddressFor(
	Address address
)

Function GetExternalAddressFor ( 
	address As Address
) As Address

Address^ GetExternalAddressFor(
	Address^ address
)

abstract GetExternalAddressFor : 
        address : Address -> Address