fn new(dic: &'a Dictionary<Own>) -> Self {
        Iter {
            dic,
            last_key: None,
        }
    }
/// Create an Iterator from a unique Dictionary.
Create an Iterator from a unique Dictionary.
Create an Iterator from a unique Dictionary .
fn new(dic: &'a Dictionary<Own>) -> Self {
        Iter {
            dic,
            last_key: None,
        }
    }
fn new ( dic : & ' a Dictionary < Own > ) -> Self { Iter { dic , last_key : None , } }
Create an Iterator from a unique Dictionary.
Create an Iterator from a unique Dictionary .
dic
&'a Dictionary<Own>