How can I scale a model over time in CZML?

I am studying CZML using an example.

I want to change the scale of the model according to time.

For example. if there is an object moving from 1 pm to 2 pm, I want to make the object bigger or smaller every 10 minutes.

Is this possible in CZML?

For anyone else following this was answered here: https://github.com/AnalyticalGraphicsInc/cesium/issues/8551