making possible to use extra subtypes like the ones defined on future.builtins
making possible to use extra subtypes like the ones defined on future.builtins

kurtbrose/schema,Abd4llA/schema,keleshev/schema,bcaudell95/schema,AdamCanady/schema,skorokithakis/schema,Liwink/schema,sjakobi/schema,dylanninin/schema,jab/schema,a-saad/schema,werehuman/schema,lzjun567/schema