显示桑基图每列的名称

[Cyycl]

What problem does this feature solve?

显示桑基图每列的名称。例如桑基图有三列，注册， 认证，活跃，每一列都有自己的nodes，怎么在每列下方显示对应的列名。

What does the proposed API look like?

在levels中增加一个label属性，设置该列的名称

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[lansefengxinzi]

这个现在还没有实现