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The libnm API fir checkpoints was only introduced with 1.11. It is not yet stable, so there is still time to adjust it. Note that this changes API/ABI of the development branch. Changes: - we only add async variants of the checkpoint functions. I believe that synchronous D-Bus methods are fundamentally flawed, because they mess up the ordering of events. Rename the async functions by removing the "_async" suffix. This matches glib style, for which the async form is also not specially marked. - for function that refere to a particular checkpoint (rollback and destroy), accept the D-Bus path as string, instead of an NMCheckpoint instance. This form is more flexible, because it allows to use the function without having a NMCheckpoint instance at hand. On the other hand, if one has a NMCheckpoint instance, he can trivially obtain the path to make the call.
These examples show how to call libnm from Python using GObject introspection.