You can search for identifiers within the package.
in-package search v0.2.0
caps.tcb
TCB.Filename
val basename : string -> string
val dirname : string -> string
val concat : string -> string -> string
val chop_extension : string -> string
val is_relative : string -> bool
val quote : string -> string
val current_dir_name : string
val parent_dir_name : string