Refreshall Shared Similar to Refreshall DeviceGroup

[rebelfish]

I can make a single call to pull the DeviceGroup tree using:

from panos.panorama import Panorama, DeviceGroup
pano = Panorama(hn, un, pw)
dgs = DeviceGroup.refreshall(pano)

I can then cycle through all the various Objects and Policy element in each DG rather than making a bunch of API calls for each.
Similarly, I would like to pull down the Shared tree for similar ease rather than trying a bunch of API calls that may or may not be relevant. Perhaps a class Shared could be added to panos.panorama to facilitate?

from panos.panorama import Panorama, Shared
pano = Panorama(hn, un, pw)
shared = Shared.refreshall(pano)