Create a new query builder for the pivot table.

        :rtype: orator.orm.Builder

def _new_pivot_query(self):
        """
        Create a new query builder for the pivot table.

        :rtype: orator.orm.Builder
        """
        query = self.new_pivot_statement()

        for where_args in self._pivot_wheres:
            query.where(*where_args)

        return query.where(self._foreign_key, self._parent.get_key())