Type Alias AlternativeSyntax2 

pub type AlternativeSyntax2<T: Config> = StorageMap<_GeneratedPrefixForStorageAlternativeSyntax2<T>, Blake2_128Concat, T::AccountId, u32>;

Lastly, all storage items, as you saw, had to be generic over T. If they want to use an item from Config, <T: Config> should be used.

Storage type is StorageMap with key type T :: AccountId and value type u32.

Aliased Type

pub struct AlternativeSyntax2<T: Config>(/* private fields */);