You can search for identifiers within the package.
in-package search v0.2.0
opam-state
OpamSysInteract
val packages_status : OpamSysPkg.Set.t -> OpamSysPkg.Set.t * OpamSysPkg.Set.t
val install_packages_commands : OpamSysPkg.Set.t -> (string * string list) list
val install : OpamSysPkg.Set.t -> unit
val update : unit -> unit
val repo_enablers : unit -> string option