macro_rules! wrap_extended_storage_double_map { (storage: $storage: ident, name: $name: ident, key1: $key1: ty, key2: $key2: ty, value: $val: ty, length: $len: ty) => { ... }; }
Expand description
Same as wrap_storage_double_map!
, but with extra implementations
of CountedByKey
, IterableMap
and IterableByKeyMap
over double map values.
PrefixIterator
from frame_support
and KeyValueIteratorWrap
from
this crate should be in scope.