Individual received TCP segment
val pp_segment : Stdlib.Format.formatter -> segment -> unitval pp : Stdlib.Format.formatter -> t -> unitval create : rx_data:(Cstruct.t list option * Sequence.t option) Lwt_mvar.t -> wnd:Window.t -> state:State.t -> tx_ack:(Sequence.t * int) Lwt_mvar.t -> tval is_empty : t -> bool