Get the column instance for a column change.

        :type table: orator.dbal.table.Table

        :rtype: orator.dbal.column.Column

def _get_column_for_change(self, table, fluent):
        """
        Get the column instance for a column change.

        :type table: orator.dbal.table.Table

        :rtype: orator.dbal.column.Column
        """
        return table.change_column(
            fluent.name, self._get_column_change_options(fluent)
        ).get_column(fluent.name)