protected void addFilenameByOffset(int offset, String filename) {
		filenamesArray.add(filename);
		filenameByOffset.put(offset, filename);
	}
Stores the filename for the offset given.  Also adds name to array, so order of call matters
@param offset the offset for which to store the filename
@param filename the filename to store
Ghidra/Features/PDB/src/main/java/ghidra/app/util/bin/format/pdb2/pdbreader/ModuleInformation.java