You can search for identifiers within the package.
in-package search v0.2.0
val thumb_done : Evas.obj -> (Evas.obj -> unit) -> unit
val thumb_error : Evas.obj -> (Evas.obj -> unit) -> unit
val drop : Evas.obj -> (Evas.obj -> string -> unit) -> unit
val clicked : Evas.obj -> (Evas.obj -> unit) -> unit