public void destroyOnForTestsOnly(Connection con, Object key, Object expectedOldValue,
      Operation operation, EntryEventImpl event, Object callbackArg) {
    DestroyOp.execute(con, pool, regionName, key, expectedOldValue, operation, event,
        callbackArg);
  }
Does a region entry destroy on the server using the given connection.

@param con the connection to use to send to the server
@param key the entry key to do the destroy on
@param expectedOldValue the value that the entry must have to perform the operation, or null
@param operation the operation being performed (Operation.DESTROY, Operation.REMOVE)
@param event the event for this destroy operation
@param callbackArg an optional callback arg to pass to any cache callbacks
geode-core/src/main/java/org/apache/geode/cache/client/internal/ServerRegionProxy.java