public static Reference getReference(Program program, Reference ref, Program otherProgram) {
		Address fromAddr = getCompatibleAddress(program, ref.getFromAddress(), otherProgram);
		if (fromAddr == null) {
			return null;
		}
		if (ref.isMemoryReference()) {
			Address toAddr = getCompatibleAddress(program, ref.getToAddress(), otherProgram);
			if (toAddr == null) {
				return null;
			}
			return otherProgram.getReferenceManager()
					.getReference(fromAddr, toAddr, ref.getOperandIndex());
		}
		Reference otherRef = otherProgram.getReferenceManager()
				.getPrimaryReferenceFrom(fromAddr, ref.getOperandIndex());
		if (otherRef != null && ref.getToAddress().hasSameAddressSpace(otherRef.getToAddress())) {
			return otherRef;
		}
		return null;
	}
Given a reference for a specified program, get the corresponding reference from the 
specified otherProgram.  A Non-memory reference is considered a suitable reference
for returning if its destination address is from the same address space (i.e., stack, 
register, etc.) 
@param program program which contains the specified reference instance
@param ref reference to look for
@param otherProgram other program
@return corresponding reference for otherProgram or null if no such reference exists.
Ghidra/Features/Base/src/main/java/ghidra/program/util/DiffUtility.java