type
  quicly_maxsender_t* {.importc, header: "quicly/maxsender.h", bycopy.} = object
    max_committed*: int64
    max_acked*: int64
    num_inflight*: csize_t
    force_send* {.bitsize: 1.}: cuint

  quicly_maxsender_sent_t* {.importc, header: "quicly/maxsender.h", bycopy.} = object
    inflight* {.bitsize: 1.}: uint64
    value* {.bitsize: 63.}: uint64