module Core_map_intf:Test whether a map is empty or not.sig..end
module List: Listmodule type Key = Comparator.Premodule type Key_binable = Comparator.Pre_binablemodule type Accessors =sig..end
type('a, 'comparator, 'z)create_options_without_comparator ='z
type('a, 'comparator, 'z)create_options_with_comparator =comparator:('a, 'comparator) Comparator.t -> 'z
module type Creators =sig..end
module type S =sig..end
module type S_binable =sig..end