`transparentImage.gif` is a 1x1 transparent gif which comes from [this wikimedia page](https://commons.wikimedia.org/wiki/File:Transparent.gif):

![](transparentImage.gif)

This is the image used a placeholder for the `GoogleCircleAvatar` widget.

The variable `_transparentImage` in `lib/widgets.dart` is the list of bytes of `transparentImage.gif`.