Refreshes existing lock lock_token for a resource identified by uri, or, in case it's null, on the
URI defined in associated Source.
The lock_token is returned from lock_sync and the uri
should be the same as that used with lock_sync.
| this | |
| uri |
URI to lock, or |
| lock_token |
token of an existing lock |
| lock_timeout |
timeout for the lock, in seconds, on 0 to infinity |
| cancellable |
optional Cancellable object, or |
|
Whether succeeded. |