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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 insert_tracking_record(self):
 """ SQL statement that inserts tracking records. """

        if self._insert_tracking_record is None:
            self._insert_tracking_record = self._prepare_insert(
                tmpl=self._insert_values_tmpl,
                placeholder_for_id=True,
                record_class=self.tracking_record_class,
                field_names=self.tracking_record_field_names,
            )
        return self._insert_tracking_record