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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _update_index(self):
 """ Update the reference to the index within the table """
 
        d = self.declaration
        self.index = self.view.model.index(d.row, d.column)
        if self.delegate:
            self._refresh_count += 1
            timed_call(self._loading_interval, self._update_delegate)