@Override
	public int compareTo(Address a) {
		if (contains(a)) {
			return 0;
		}
		return address.compareTo(a);
	}
@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