Set Bullet Behavior "Strict Subproofs".
(** * Results related to resouce_decay *)
(* todo: maybe remove one of those lemmas *)

Lemma isSome_find_map addr f lset :
ssrbool.isSome (AMap.find (elt:=option rmap) addr (AMap.map f lset)) =
ssrbool.isSome (AMap.find (elt:=option rmap) addr lset).