You can search for identifiers within the package.
in-package search v0.2.0
module T : Core_kernel.T
type t = T.t
val list : unit -> string list
list source is a list of names of source providers
list source
val find : string -> t source option
create name args finds a source provider with the given name and creates it
create name args
val register : string -> t source -> unit
register name cons registers a method that creates a given source of information. If a method with the given name already exists, then it will be superseded by a new one.
register name cons