pub fn last_value_of(&self, key: &K) -> Option<&V> {
        self.find_last_position(key)
            .ok()
            .map(|idx| &self.values[idx - 1])
    }
/// Returns the last (in insertion order) value of `key`
Returns the last (in insertion order) value of `key`
Returns the last ( in insertion order ) value of ` key `
pub fn last_value_of(&self, key: &K) -> Option<&V> {
        self.find_last_position(key)
            .ok()
            .map(|idx| &self.values[idx - 1])
    }
pub fn last_value_of ( & self , key : & K ) -> Option < & V > { self . find_last_position ( key ) . ok ( ) . map ( | idx | & self . values [ idx - 1 ] ) }
Returns the last (in insertion order) value of `key`
Returns the last ( in insertion order ) value of ` key `
&self
key
&K
&self
key
&K