     public var endIndex: Int {
         return keys.count
     }
-
-    /// - returns: Element at the given `index`.
-    public subscript (index: Int) -> (Key, Value) {
-        let key = keys[index]
-        let value = unsorted[key]!
-        return (key, value)
-    }
 }
 
 extension SortedDictionary: BidirectionalCollection {

    public func index(before i: Int) -> Int {
        assert(i > 0, "Cannot decrement index to \(i - 1)")
        return i - 1
    }
}


//  Created by James Bean on 12/23/16.
//
//

/// Ordered dictionary which has sorted `keys`.
public struct SortedDictionary<Key, Value>: DictionaryProtocol where Key: Hashable & Comparable {
