Function sp_state_machine::read_child_proof_check_on_proving_backend

pub fn read_child_proof_check_on_proving_backend<H>(
    proving_backend: &TrieBackend<MemoryDB<H>, H>, 
    child_info: &ChildInfo, 
    key: &[u8]
) -> Result<Option<Vec<u8>>, Box<dyn Error>> where
    H: Hasher,
    H::Out: Ord + Codec, 

Check child storage read proof on pre-created proving backend.