private void createDataReference(Program pgm, Address fromAddr, Address toAddr) {
		ReferenceManager refMgr = pgm.getReferenceManager();
		refMgr.addMemoryReference(fromAddr, toAddr, RefType.DATA, SourceType.USER_DEFINED, 0);
	}
<CODE>ProgramMerge2Test</CODE> tests the <CODE>ProgramMerge</CODE> class
to verify it correctly merges various types of program differences.
The tests modify copies of the same program to cause differences
between these two programs, which can then be merged.
Ghidra/Features/Base/src/test.slow/java/ghidra/program/util/ProgramMerge2Test.java