private void cacheNamespaceStorage(long namespaceID) throws IOException {
		variableAddrLookupCache.clear();
		storageAddrLookupCache.clear();
		lastNamespaceCacheID = namespaceID;
		DBRecord[] records = adapter.getRecordsForNamespace(namespaceID);
		for (DBRecord rec : records) {
			OldVariableStorage varStore = new OldVariableStorage(rec);
			variableAddrLookupCache.put(varStore.variableAddr, varStore);
			storageAddrLookupCache.put(varStore.storageAddr, varStore);
		}
	}
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