Function sp_state_machine::prove_child_read

pub fn prove_child_read<B, H, I>(
    backend: B,
    child_info: &ChildInfo,
    keys: I
) -> Result<StorageProof, Box<dyn Error>>where
    B: AsTrieBackend<H>,
    H: Hasher,
    H::Out: Ord + Codec,
    I: IntoIterator,
    I::Item: AsRef<[u8]>,

Generate child storage read proof.