'Move the cursor to the next row. Do not have an exception if there is
no next row. Instead return False when Eof() is subsequently called.
If you said you had indices in your VTTable.BestIndex() return, and
they were selected for use as provided in the parameters to Filter()
then you should move to the next appropriate indexed and constrained
row.'

def Next(self):

    self.index += 1
