Genarg.RegisterWarning: although the following APIs use genarg_type the values must always be ExtraArg some_tag.
val register0 :
( 'raw, 'glb, 'top ) genarg_type ->
( 'raw, 'glb, 'top ) M.obj ->
unitRegister a ground type manipulation function.
val obj : ( 'raw, 'glb, 'top ) genarg_type -> ( 'raw, 'glb, 'top ) M.objRecover a manipulation function at a given type.
val fold_keys : ( ArgT.any -> 'acc -> 'acc ) -> 'acc -> 'accFold over the registered keys.