I’ve edited your post to add the spoiler tags. If you post a full passing solution to a challenge and have questions about it, please surround it with [spoiler] and [/spoiler] tags on the line above and below your solution code.
I highly recommend against looking at the solutions before you solve the challenge. You can always ask questions here and we’ll help you fix your code.
This syntax is saying that you want to access a property of the records variable. Specifically, you want to access the property with the name stored in the id variable.