pub fn get_or<T, HashFn, R>(hash: &HashFn, key: &[u8], default_value: T) -> T where
T: Decode + Sized,
HashFn: Fn(&[u8]) -> R,
R: AsRef<[u8]>, Expand description
Return the value of the item in storage under key, or default_value if there is no
explicit entry.