Method with

fendermint/eth/api/src/cache.rs:74–80

(&self, f: F)

    }

    pub fn with<F, T>(&self, f: F) -> T
    where
        F: FnOnce(&mut LruCache<K, V>) -> T,
    {
        let mut guard = self.cache.lock().expect("cache poisoned");
        f(&mut guard)
    }
}

/// Facilitate Ethereum address <-> Actor ID lookups.