DBRecord getRecord(long key) throws IOException {
		return variableStorageTable.getRecord(key);
	}
Construction legacy variable storage adapter.  The old variable storage 
table must exist (see {@link #VARIABLE_STORAGE_TABLE_NAME}).
@param handle database handle
@throws IOException if VariableStorage table is missing or invalid schema version detected
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/symbol/OldVariableStorageDBAdapterV0V1.java