Module Accessor.Subtyping
The Subtyping module contains all the types used for accessor subtyping. You shouldn't have to use it, but it's here for the documentation.
type at_least_one=[|`at_least_one]type at_most_one=[|`at_most_one]type coerce=[|`coerce]type construct=[|`construct]type get=[|`get]type map=[|`map]type constructor= constructtype equality=[|get|map|at_most_one|at_least_one|construct|coerce]type field=[|get|map|at_most_one|at_least_one]type getter=[|get|at_least_one|at_most_one]type isomorphism=[|get|map|at_most_one|at_least_one|construct]type many=[|get|map]type many_getter= gettype mapper= maptype nonempty=[|get|map|at_least_one]type nonempty_getter=[|get|at_least_one]type optional=[|get|map|at_most_one]type optional_getter=[|get|at_most_one]type variant=[|get|map|at_most_one|construct]