public DataNode getDataNode(final String logicTableName) {
        ShardingTable shardingTable = getShardingTable(logicTableName);
        return shardingTable.getActualDataNodes().get(0);
    }
@Test
    void assertGetDataNodeByLogicTable() {
        assertThat(createMaximumShardingRule().getDataNode("logic_table"), is(new DataNode("ds_0.table_0")));
    }