@Override
	public byte getReferenceLevel(Address toAddr) {

		try {
			DBRecord rec = toAdapter.getRecord(addrMap.getKey(toAddr, false));
			if (rec != null) {
				return rec.getByteValue(ToAdapter.REF_LEVEL_COL);
			}
		}
		catch (IOException e) {
			program.dbError(e);
		}
		return SymbolUtilities.UNK_LEVEL;
	}
Returns the reference level for the references to the given address
@param toAddr the address at which to find the highest reference level
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/references/ReferenceDBManager.java