Return Early Pattern for Functions - right answer - not working

<%= @topic_view.topic.title %>
<%= @topic_view.topic.average_rating %> <%= @topic_view.topic.posts.count { |p| !!p.custom_fields['rating'] } %>

Tell us what’s happening:
I received this error message when I competed my code.

abTest(2,2) should return a number

abTest(2,2) should return 8

abTest(2,8) should return 18

abTest(3,3) should return 12

// tests completed

Your code so far

    return undefined;
  }
```js

// Setup
function abTest(a, b) {
  // Only change code below this line
if (a < 0 || b < 0) {
    return undefined;
  }


  
  // Only change code above this line
}
// Change values below to test your code
abTest(2,2);

Your browser information: Google Chrome

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.132 Safari/537.36.

Link to the challenge:
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-javascript/return-early-pattern-for-functions/

your answer is correct but the code you are pasting is incomplete, you have removed the additional return statement and modified the original code the test requires outside of where you were supposed to… also what is the additional code you have added on top of //setup