Undo and redo

With the SDHistoryUtils.UndoGroup class, users  can group actions in order to undo or redo them all in one command.

These groups are named by users, and will appear by that name in the undo/redo list in the user interface.  This makes large numbers of actions more manageable.

import sd
from sd.api.sdhistoryutils import *

# Get the application and package manager objects.
cxt = sd.getContext()
app = cxt.getSDApplication()
pkgMgr = app.getPackageMgr()

# Group one or more changes into an undo group.
with SDHistoryUtils.UndoGroup("My Undo Group"):
    # Create two new packages.