def get_offset_range(self, row_offset, column_offset):
return self._get_range('<STR_LIT>', rowOffset=row_offset, columnOffset=column_offset)<EOL>
Gets an object which represents a range that's offset from the specified range.
 The dimension of the returned range will match this range.
 If the resulting range is forced outside the bounds of the worksheet grid,
  an exception will be thrown.
:param int row_offset: The number of rows (positive, negative, or 0)
 by which the range is to be offset.
:param int column_offset: he number of columns (positive, negative, or 0)
 by which the range is to be offset.
:return: Range