val sexp_of_t : ('a -> Ppx_sexp_conv_lib.Sexp.t) -> 'a t -> Ppx_sexp_conv_lib.Sexp.tval create : len:int -> _ tval length : _ t -> intval set : 'a t -> int -> 'a Core_kernel.Heap_block.t option -> unitval get : 'a t -> int -> 'a Core_kernel.Heap_block.t optionval is_some : _ t -> int -> boolval is_none : _ t -> int -> bool