array litterals

MVMCore/MVMCore/Categories/Dictionary+MFConvenience.swift

@@ -81,7 +81,10 @@ public extension Dictionary {
     }
     
     func optionalArrayForKey(_ key : String) -> [Any]? {
-        return optionalArrayForChainOfKeysOrIndexes([key])
+        guard let key = key as? Key else {
+            return nil
+        }
+        return self[key] as? [Any]
     }
     
     /// Return a Bool after looking up the specified key. This will return false if the key does not exist