static CppCompositeType createGG2_struct32(VxtManager vxtManager, CppCompositeType CC2_struct) {
		try {
			CppCompositeType GG2_struct = createStruct32("GG2", 12);
			GG2_struct.addDirectVirtualBaseClass(CC2_struct.getComposite(), CC2_struct, 0,
				ClassUtils.VXPTR_TYPE,
				1);
			GG2_struct.addMember("gg21", intT, false, 4);
			return GG2_struct;
		}
		catch (Exception e) {
			String msg = "Error in static initialization of test: " + e;
			Msg.error(null, msg);
			throw new AssertException(msg);
		}
	}
This is not part of the DataTypeManager API... it is only for testing when needing
 to clear results because of another run that creates the same-named types
Ghidra/Features/PDB/src/test/java/ghidra/app/util/pdb/pdbapplicator/CppCompositeTypeTest.java