Trait Fetch 

pub trait Fetch<K, V>: StorageBackend {
    // Required method
    fn fetch(&self, key: &K) -> Result<Option<V>, Self::Error>;
}

Fetch<K, V> trait extends the StorageBackend with fetch operation for the (key: K, value: V pair); therefore, it should be explicitly implemented for the corresponding StorageBackend.

Required Methods

fn fetch(&self, key: &K) -> Result<Option<V>, Self::Error>

Fetches the value associated with the key from the storage.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors