@Override
	public int getIntProperty(String name) throws NoValueException {
		PropertyMapManager upm = codeMgr.getPropertyMapManager();
		IntPropertyMap pm = upm.getIntPropertyMap(name);
		if (pm == null) {
			throw NoValueException.noValueException;
		}
		try {
			validate(lock);
			return pm.getInt(address);
		}
		catch (ConcurrentModificationException e) {
			throw NoValueException.noValueException;
		}
	}
@see ghidra.program.model.listing.CodeUnit#addOperandReference(int,
     ghidra.program.model.address.Address,
     ghidra.program.model.symbol.RefType, SourceType)
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/code/CodeUnitDB.java