protected DIECreator newMember(DebugInfoEntry parentStruct, String fieldName,
			DebugInfoEntry dataType, int offset) {
		assertTrue(
			dataType == null || dataType.getCompilationUnit() == parentStruct.getCompilationUnit());
		ensureCompUnit();
		return newMember(parentStruct, fieldName, dataType.getOffset(), offset);
	}
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