contract A {
    Counter public counter;
    /**
     *  TODO: this fuzz use too much time to execute
    function testGetFuzz(bytes[2][] memory kvs) public {
        for (uint256 i = 0; i < kvs.length; i++) {
            bytes32 root = trie.update(kvs[i][0], kvs[i][1]);
            console.logBytes32(root);
        }

        for (uint256 i = 0; i < kvs.length; i++) {
            (bool exist, bytes memory value) = trie.get(kvs[i][0]);
            console.logBool(exist);
            console.logBytes(value);
            require(exist);
            require(BytesSlice.equal(value, trie.getRaw(kvs[i][0])));
        }
    }
    */
}