pub trait TryAppendDoubleMap<K1: Encode, K2: Encode, T: StorageTryAppend<I>, I: Encode> {
    fn try_append<LikeK1: EncodeLike<K1> + Clone, LikeK2: EncodeLike<K2> + Clone, LikeI: EncodeLike<I>>(
        key1: LikeK1,
        key2: LikeK2,
        item: LikeI
    ) -> Result<(), ()>; }
Expand description

Storage double map that is capable of StorageTryAppend.

Required Methods

Try and append the item into the storage double map at the given key.

This might fail if bounds are not respected.