val ncontent2pres:
?skip_initial_lambdas:int -> ?skip_thm_and_qed:bool ->
ids_to_nrefs:(NTermCicContent.id, NReference.reference) Hashtbl.t ->
val ncontent2pres:
?skip_initial_lambdas:int -> ?skip_thm_and_qed:bool ->
ids_to_nrefs:(NTermCicContent.id, NReference.reference) Hashtbl.t ->