Blit.Make1Make1 is for blitting between two values of the same polymorphic type.
val blit : src:'a Sequence.t -> src_pos:int -> dst:'a Sequence.t -> dst_pos:int -> len:int -> unitval blito : src:'a Sequence.t -> ?src_pos:int -> ?src_len:int -> dst:'a Sequence.t -> ?dst_pos:int ->
unit -> unitval unsafe_blit : src:'a Sequence.t -> src_pos:int -> dst:'a Sequence.t -> dst_pos:int -> len:int -> unitval sub : 'a Sequence.t -> pos:int -> len:int -> 'a Sequence.tval subo : ?pos:int -> ?len:int -> 'a Sequence.t -> 'a Sequence.t