static CppCompositeType createJ1_struct64(VxtManager vxtManager, CppCompositeType I1_struct,
			CppCompositeType I2_struct, CppCompositeType E_struct, CppCompositeType C_struct) {
		try {
			CppCompositeType J1_struct = createStruct64("J1", 96);
			J1_struct.addDirectBaseClass(I1_struct.getComposite(), I1_struct, 0);
			J1_struct.addDirectBaseClass(I2_struct.getComposite(), I2_struct, 40);
			J1_struct.addIndirectVirtualBaseClass(C_struct.getComposite(), C_struct, 0,
				ClassUtils.VXPTR_TYPE,
				1);
			J1_struct.addIndirectVirtualBaseClass(E_struct.getComposite(), E_struct, 0,
				ClassUtils.VXPTR_TYPE,
				2);
			J1_struct.addMember("j11", intT, false, 80);
			return J1_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