Function storage_root_prehashed 

pub fn storage_root_prehashed<I>(storage: I) -> FixedBytes<32>
where
    I: IntoIterator<Item = (FixedBytes<32>, Uint<256, 4>)>,

Available on crate feature trie only.

Compute the storage root for a given account with prehashed slots using triehash::trie_root.