This content was released on Mar 7 2017. The official support period is 6-months from this date.
You'll finish up the Mosaic layout as you learn how to dynamically size each cell, independently, based on its content. See how to use the AVMakeRect() method to calculate an image height, and calculate a labels height based on it's font and size.
This is a companion discussion topic for the original entry at https://www.kodeco.com/3987-custom-collection-view-layout/lessons/11