val blito : (src, Core__.Import.Bytes.t) Core.Iobuf_intf.consuming_blito
val blit : (src, Core__.Import.Bytes.t) Core.Iobuf_intf.consuming_blit
val unsafe_blit : (src, Core__.Import.Bytes.t) Core.Iobuf_intf.consuming_blit
val sub : src ‑> len:int ‑> string