protected DIECreator newMember(DebugInfoEntry parentStruct, String fieldName,
			long typeDIEOffset, int offset) {
		ensureCompUnit();
		DIECreator field = new DIECreator(dwarfProg, DWARFTag.DW_TAG_member) //
				.addString(DW_AT_name, fieldName)
				.addRef(DW_AT_type, typeDIEOffset)
				.setParent(parentStruct);
		if (offset != -1) {
			field.addInt(DW_AT_data_member_location, offset);
		}
		return field;
	}
Base class for unit tests needing DWARF DIEs.  Provides 2 DWARF compile-units and helper
methods to create DIE records.
Ghidra/Features/Base/src/test/java/ghidra/app/util/bin/format/dwarf/DWARFTestBase.java