Calendar chart is missing but documented

In the current version of the chart documentation for Blazor, there is a calendar chart component shown. I was unable to find any files in the source tree related to the calendar chart component. Is it possible to use this component? https://antblazor.com/en-US/charts/calendarchart

Thanks in advance.

---

Translated to chinese using translator:

在当前版本的Blazor的图表文档中，有一个日历图表组件。我无法在源码树中找到日历图表组件的任何文件。是否可以使用这个组件？https://antblazor.com/en-US/charts/calendarchart
提前感谢。