End STABILITY.

(* Specifications: *)
Lemma add_composite_definitions_incr:
forall id co defs env1 env2,
add_composite_definitions env1 defs = OK env2 ->
env1!id = Some co -> env2!id = Some co.
Lemma add_composite_definitions_incr:
forall id co defs env1 env2,
add_composite_definitions env1 defs = OK env2 ->
env1!id = Some co -> env2!id = Some co.