How can you configure or mutate a Google Wave gadget after creating one in Python? The following code will load the gadget via XML:
from waveapi import document
gadget = document.Gadget('http://domain.com/gadget.xml')
The API reference says you can pass a dictionary of initial properties, but I can't find any information on where the gadget would specify those initial properties. There are mentions of a getField/setField pair of methods to mutate gadget properties, but I can't find an API reference of them or again find where the gadget would specify these properties.
This came up because I am adding a Wave gadget as part of the response by a Wave robot, as described in the Wave Extension FAQ.