public Address getStorageAddress(Address variableAddr) throws IOException {
		OldVariableStorage varStore = getVariableStorage(variableAddr);
		return varStore != null ? varStore.storageAddr : null;
	}
Construct a read-only variable storage manager for the old record format
utilized by the VariableStorage table (NOTE: old table name does not have
a space in the name).  This adapter is intended for use during upgrades
only.
@param handle the database handle.
@param addrMap the address map
@param monitor the task monitor.
@throws IOException if a database error occurs.
@throws CancelledException if the user cancels the upgrade.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/symbol/OldVariableStorageManagerDB.java