protected DIECreator newSpecStruct(DebugInfoEntry declDIE, int size) {
		ensureCompUnit();
		DIECreator struct = new DIECreator(dwarfProg, DW_TAG_structure_type) //
				.addRef(DW_AT_specification, declDIE)
				.addInt(DW_AT_byte_size, size);
		return struct;
	}
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