'How to make IntelliJ comments with the '|' symbol?

I am not sure if they are comments and if it's only for IntelliJ, but I want to know that. Also, how to make them? Why would I use them instead of classic comments?

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The source code was from an Instagram page featuring Kotlin posts and I wanted to know more about it.



Solution 1:[1]

It's the Render Javadocs feature.

render

Sources

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Source: Stack Overflow

Solution Source
Solution 1 CrazyCoder