It looks like Slack was able to leverage the new how to schema to get some of their API help documentation pages to show richer results in the Google search results.
Max Prin from Merkle spotted it and posted about it on Twitter. Here is the screen shot he shared of it, but you can see it yourself by searching for [how to create slack slash command]:

Aaron Bradley said on Twitter this is the first he has seen this in the wild, and he watches these things like a hawk.
Here is the page source that Slack is using for this:

Forum discussion at Twitter.

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