@Override
	RecordIterator getSymbolsByAddress(Address startAddr, boolean forward) throws IOException {
		KeyToRecordIterator it =
			new KeyToRecordIterator(symbolTable, new AddressIndexPrimaryKeyIterator(symbolTable,
				SYMBOL_ADDR_COL, addrMap, startAddr, forward));
		return new V3ConvertedRecordIterator(it);
	}
SymbolDatabaseAdapter for version 3

This version provides for fast symbol lookup by namespace and name and introduced the use of 
sparse table columns for storing optional symbol data (hash, primary, datatype-ID, variable-offset).
It was created in June 2021 with ProgramDB version 24. 
It was first in affect within Ghidra starting at version 10.1
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/symbol/SymbolDatabaseAdapterV3.java