title: Does return is added implicitly in a callback function?
body: <p>I have a code (attached screenshot) that in one place it is written explictiy <strong>reutrn</strong> inside a callback, and in another one it isn't. I'm trying to understand what is the reason for it? In my opinion return statement should be added also in the first one. Am i wrong?</p>
  <p><a href="https://i.stack.imgur.com/ZwL0E.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ZwL0E.png" alt="enter image description here" /></a></p>