Where can I get text of the comments saved by pressing "Comment" button?

A user can add a comment to an existing blog, and while while actions/blog/save.php file saves the initial blog content, I am clear as to how comments are saved. 

In the browser I see the following end-point

http://localhost/elgg-2.3.1/action/comment/save

Which file(s) do I need to look into to process comments before they are saved into the database?

 

Beginning Developers

Beginning Developers

This space is for newcomers, who wish to build a new plugin or to customize an existing one to their liking