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contract ArrayMapping {
    address[] public keys;
    bytes4[] public values;

function setValue(address[] key, bytes4[] value) public {
        //This will set the whole arrays
        // Array in the format
        // key[i] = value[j,j+1.....m]
    }

function getValues(address key) public view returns (address[]) {
        uint256 index = findIndex(key);
        require(index < keys.length, "Key does not exist");
        uint256 start_index, end_index = findValueIndex(index);
        require(start_index< end_index, "Values does not exist");
        return values[start_index:end_index];
    }

}