Function new 

pub fn new<K, V>() -> (WriteHandle<K, V, (), RandomState>, ReadHandle<K, V, (), RandomState>)
where
    K: StableHashEq + Clone,
    V: StableHashEq,

Create an empty eventually consistent map.

Use the Options builder for more control over initialization.

If you want to use arbitrary types for the keys and values, use new_assert_stable.