Method lock_key_and_try

src/models/common.rs:638–645

(&self, k: K, f: F)

    }

    pub fn lock_key_and_try<F, R>(&self, k: K, f: F) -> R
    where
        F: FnOnce() -> R,
    {
        let index = self.hash_key(&k);
        let mut ht = self.hash_table_list[index].lock().unwrap();
        f()
    }

    pub fn with_value<F, R>(&self, k: &K, f: F) -> Option<R>
    where