function getPayeeIndex(bytes32 _requestId, address _address)
        public
        view
        returns(int16)
    {
        
        if (requests[_requestId].payee.addr == _address) {
            return 0;
        }

        for (uint8 i = 0; subPayees[_requestId][i].addr != address(0); i = i.add(1)) {
            if (subPayees[_requestId][i].addr == _address) {
                
                return i+1;
            }
        }
        return -1;
    }