Type Alias DerivativeExtra 

pub type DerivativeExtra<T: Config<I>, I: 'static = ()> = StorageMap<_GeneratedPrefixForStorageDerivativeExtra<T, I>, Blake2_128Concat, <T as Config<I>>::Derivative, <T as Config<I>>::DerivativeExtra, OptionQuery>;

Storage type is [StorageMap] with key type DerivativeOf < T, I > and value type DerivativeExtraOf < T, I >.

Aliased Type

pub struct DerivativeExtra<T: Config<I>, I: 'static = ()>(/* private fields */);