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type 'a t [@@deriving yojson]
exception Empty_path
exception Duplicate_child
exception Nonexistent_path
exception Insert_error of string
type position = Before of string | After of string | End | Default
val make : 'a -> string -> 'a t
val make_full : 'a -> string -> ('a t) list -> 'a t
val name_of_node : 'a t -> string
val data_of_node : 'a t -> 'a
val children_of_node : 'a t -> 'a t list
val find : 'a t -> string -> 'a t option
val find_or_fail : 'a t -> string -> 'a t
val adopt : 'a t -> 'a t -> 'a t
val insert : ?position:position -> ?children:('a t list) -> 'a t -> string list -> 'a -> 'a t
val insert_multi_level : 'a -> 'a t -> string list -> string list -> 'a -> 'a t
val merge_children : ('a -> 'a -> 'a) -> 'a t -> 'a t
val delete : 'a t -> string list -> 'a t
val update : 'a t -> string list -> 'a -> 'a t
val rename : 'a t -> string list -> string -> 'a t
val list_children : 'a t -> string list
val get : 'a t -> string list -> 'a t
val get_existent_path : 'a t -> string list -> string list
val get_data : 'a t -> string list -> 'a
val exists : 'a t -> string list -> bool
val children_of_path : 'a t -> string list -> string list
val sorted_children_of_node : (string -> string -> int) -> 'a t -> ('a t) list
val copy : 'a t -> string list -> string list -> 'a t
val move : 'a t -> string list -> position -> 'a t
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