#[local]
Hint Resolve incl_cons : core.

Lemma incl_map A B (f : A -> B) l1 l2 : incl l1 l2 -> incl (map f l1) (map f l2).
#[global]
Hint Resolve incl_refl incl_tl incl_tran incl_appl incl_appr incl_cons
incl_app incl_map: datatypes.