Function sp_trie::read_trie_value

pub fn read_trie_value<L: TrieConfiguration, DB: HashDBRef<L::Hash, DBValue>>(
    db: &DB, 
    root: &TrieHash<L>, 
    key: &[u8]
) -> Result<Option<Vec<u8>>, Box<TrieError<L>>>

Read a value from the trie.