Assign a collection to this alias.
Aliases help determine well known collections, such as 'default'. This method takes the dbus object path of the collection to assign to the alias.
This method may block and should not be used in user interface threads.
| this |
a secret service object |
| alias |
the alias to assign the collection to |
| collection_path |
the D-Bus object path of the collection to assign to the alias |
| cancellable |
optional cancellation object |
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