core.univ_map
With_default.Key
core
core.base_for_tests
core.command
core.filename_base
core.heap_block
core.top
core.validate
type 'a t
val create : default:'a -> name:Base.string -> ('a -> Base.Sexp.t) -> 'a t
val id : 'a t -> 'a Base.Type_equal.Id.t