private static CppCompositeType createDD1b_struct(DataTypeManager dtm,
			CppCompositeType DD1a_struct) throws PdbException {
		String name = "DD1b";
		CppCompositeType struct = createStruct(dtm, name, 24);
		struct.addDirectVirtualBaseClass(DD1a_struct.getComposite(), DD1a_struct,
			publicDirectAttributes, 0, ClassUtils.VXPTR_TYPE, 1);
		struct.addMember("dd1bi", intT, false, publicDirectAttributes, 8, null);
		return struct;
	}
Class to create the egray8 64-bit program and mock PDB.
<p>
This class implementation is not complete... many more classes' expected results need
codified
Ghidra/Features/PDB/src/test/java/ghidra/app/util/pdb/Egray864ProgramCreator.java