pub fn prove(&self, version: u64, keys: &[H256]) -> anyhow::Result<BatchTreeProof> {
        let (patch, mut update) = self.create_patch::<TreeEntry>(version, &[], keys)?;
        Ok(patch.create_batch_proof(&self.hasher, vec![], update.take_read_operations()))
    }
Creates a batch proof for `keys` at the specified tree version.

# Errors

- Returns an error if the version doesn't exist.
- Proxies database errors.
core/lib/zk_os_merkle_tree/src/lib.rs