You can search for identifiers within the package.
in-package search v0.2.0
mhttp
Mhttp.TCP
type t = Mnet.TCP.flow
val read : Mnet.TCP.flow -> ?off:??? -> ?len:??? -> bytes -> int
val write : Mnet.TCP.flow -> ?off:??? -> ?len:??? -> string -> unit
val close : Mnet.TCP.flow -> unit
val shutdown : Mnet.TCP.flow -> [ `read | `read_write | `write ] -> unit