Function map_split::split3

pub fn split3<'a, K: 'a, V: 'a, S, SplitType>(v: &'a mut HashMap<K, V, S>) -> (HashMapA<'a, K, V, S, SplitType>, HashMapB<'a, K, V, S, SplitType>, HashMapC<'a, K, V, S, SplitType>) where K: Eq + Hash, S: BuildHasher, V: Splittable3<'a, SplitType>

Splits a HashMap into 3 disjoint hashmap references, able to access the split parts of the stored Splittable3 values independently.