typeClass.defineAnnotatedMethods(Type.class);
typeClass.defineAnnotatedConstants(Type.class);
RubyClass builtinClass = typeClass.defineClassUnder("Builtin", typeClass,
ObjectAllocator.NOT_ALLOCATABLE_ALLOCATOR);
builtinClass.defineAnnotatedMethods(Builtin.class);
RubyModule nativeType = ffiModule.defineModuleUnder("NativeType");
defineBuiltinType(runtime, builtinClass, NativeType.CHAR, "char", "schar", "int8", "sint8");