Property definitions

core $ HashCollection :: N
	type N: HashNode[K]
lib/core/collection/hash_collection.nit:30,2--20

core $ HashMap :: N
	redef type N: HashMapNode[K, V] is fixed
lib/core/collection/hash_collection.nit:224,2--41

core $ HashSet :: N
	redef type N: HashSetNode[E] is fixed
lib/core/collection/hash_collection.nit:430,2--38