Question: Does quip.apps.ui.Image provide resizing capabilities?

[timothy-law]

I'm trying to create a custom live app that utilizes images. I've got images uploading and rendering via the quip.apps.ImageRecord type (using its chooseFile() function). However, a number of questions:

1. How do I detect the size of the image? I tried imageRecord.getOriginalImageWidth() in the render() of my component, but that returns null.

2. Per the issue title, do I need to implement my own resizing functionality, or, is this provided by quip.apps.ui.Image? If so, how do I use this? In the documentation I see onEditingModeChanged and onResizingModeChanged, but how do I actually get into editing/resizing mode?