pub fn contains_key<Q: ?Sized>(&self, k: &Q) -> bool
    where
        K: Borrow<Q>,
        Q: Eq + Hash
    {
        self.map.contains_key(Qey::from_ref(k))
    }
/// Checks if the map contains the given key.
Checks if the map contains the given key.
Checks if the map contains the given key .
pub fn contains_key<Q: ?Sized>(&self, k: &Q) -> bool
    where
        K: Borrow<Q>,
        Q: Eq + Hash
    {
        self.map.contains_key(Qey::from_ref(k))
    }
pub fn contains_key < Q : ? Sized > ( & self , k : & Q ) -> bool where K : Borrow < Q > , Q : Eq + Hash { self . map . contains_key ( Qey :: from_ref ( k ) ) }
Checks if the map contains the given key.
Checks if the map contains the given key .
&self
k
&Q
&self
k
&Q