     }
     
     class func clear() -> Bool {
-        let query = Keychain.queryWithDict([:])
+        let query = DBKeychain.queryWithDict([:])
         return SecItemDelete(query) == noErr
     }
 }

        - returns: whether the operation succeeded
    */
    public func clearStoredAccessTokens() -> Bool {
        return Keychain.clear()
    }
    /**
        Save an access token

        - returns: whether the operation succeeded
    */
    public func clearStoredAccessToken(token: DropboxAccessToken) -> Bool {
        return DBKeychain.delete(token.uid)
    }
    /**
        Delete all stored access tokens
