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#python
import k3d
# While recording state changes for undo/redo purposes, you must ensure that errors are handled properly!
context.document.start_change_set()
try:
if k3d.ui().query_message("Choose one ...", ["Succeed", "Fail"]) == 2:
raise RuntimeError("Simulated error condition.")
null_node = k3d.plugin.create("Null", context.document)
null_node.name = "Test Node"
context.document.finish_change_set("Test Change Set")
k3d.ui().message("State recording completed successfully ... check the Edit menu.")
except:
context.document.cancel_change_set()
k3d.ui().message("State recording cancelled due to an error!")
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