long getLongFromDestinationAddress(Address address) {
		if (address == null) {
			return AddressMap.INVALID_ADDRESS_KEY;
		}

		AddressMap addressMap = destinationProgram.getAddressMap();
		return addressMap.getKey(address, false);
	}
Open associated source and destination program files and complete session initialization.
@param projectData active project data
@throws IOException if source or destination program not found within specified project
or an error occured while opening them (e.g., upgrade required).
Ghidra/Features/VersionTracking/src/main/java/ghidra/feature/vt/api/db/VTSessionDB.java