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* 327: In kwallet backend, if the collection or item is
locked, a ``KeyringLocked`` exception is raised. Clients
expecting a None response from ``get_password`` under
this condition will need to catch this exception.
Additionally, an ``InitError`` is now raised if the
connection cannot be established to the DBus.
* 298: In kwallet backend, when checking an existing
handle, verify that it is still valid or create a new
connection.