interface tokenRecipient { function   receiveApproval(address _from, uint256 _oshiAmount, address _token, bytes _extraData) external; }

TypeError: Data location must be "calldata" for parameter in external function, but none was given.
    interface tokenRecipient { function receiveApproval(address _from, uint256 _oshiAmount, address _token, bytes _extraData) external; }