Function frame_support::storage::hashed::get

pub fn get<T, HashFn, R>(hash: &HashFn, key: &[u8]) -> Option<T> where
    T: Decode + Sized,
    HashFn: Fn(&[u8]) -> R,
    R: AsRef<[u8]>, 

Return the value of the item in storage under key, or None if there is no explicit entry.