pub fn migrate_custom_child<T: Config>(
    root: Vec<u8>,
    child_keys: Vec<Vec<u8>>,
    total_size: u32,
)Expand description
Migrate the list of child keys by iterating each of them one by one.
All of the given child keys must be present under one child_root.
This does not affect the global migration process tracker (MigrationProcess), and
should only be used in case any keys are leftover due to a bug.
§Warning: Doc-Only
This function is an automatically generated, and is doc-only, uncallable
stub. See the real version in
Pallet::migrate_custom_child.