Is your feature request related to a problem? If so, please give a short summary of the problem and how the feature would resolve it

The ISQLServerBulkRecord interface is a mixture of specification and implementation details.

Describe the preferred solution

Remove methods which are not called as part of actual bulk copy process via SQLServerBulkCopy#writeToServer.

Describe alternatives you've considered

Currently it's necessary to implement methods even if they just throw a UnsupportedOperationException