struct DictionaryIndex<Key : Hashable, Value> Used to access the key-value pairs in an instance of Dictionary<Key, Value>. Dictionary has two subscripting interfaces: Subscripting with a key, yielding an optional value: v = d[k]! Subscripting with an index, yielding a key-value pair: (k,v) = d[i] Inheritance Comparable, Equatable, ForwardIndexType, _Comparable, _ForwardIndexType, _Incrementable View Protocol Hierarchy → Import import Swift Instance Methods func successor() Returns the next consecutive value after self. Requires: the next value is representable. Declaration func successor() -> DictionaryIndex<Key, Value>