private void logSkippedEntry(SourceMapEntry entry, Program program) {
		Msg.warn(this,
			"Skipping source map entry " + entry.toString() + " in program " + program.getName());
	}
Determines the source map differences for the addresses in {@code addressSet}.  Source map
entries which intersect but are not contained within {@code addressSet} are ignored.
The returned {@link AddressSet} consists of the minimum addresses of all of the differing
source map entries.  This method does not check for differences between non-mapped 
{@link SourceFile}s. 

@param addressSet addresses to check for differences (from program1)
@param monitor task monitor
@return minimum addresses of differing ranges
@throws CancelledException if user cancels
Ghidra/Features/Base/src/main/java/ghidra/program/util/ProgramDiff.java