How to know if a function belong to opencv_contrib using doc?

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Hi,

I wonder if there is a quick way to know if a function belong to opencv or opencv_contrib using doc. Example using search button in doc I write calibrate :

I select cv::omnidir::calibrate and I got this page

Now is it an opencv function or opencv_contrib function?

I found a way : copy in link ccalib go back to indexpage and search in this page ccalib and I found that ccalib is in Extra modules (opencv_contrib).

Do you know a shorter way ?

Bonus question : In opencv doc many things are well explained. How to share a link to this specific page ?

@LorenaGdL I think you done a good job with doxygen and opencv may be you can help me