[ Version ( since = "3.0" ) ]
public async bool downsync (string? expression, int io_priority, Cancellable? cancellable = null) throws Error
Synchronizes messages in this described by the search expression to the local machine
asynchronously for offline availability.
When the operation is finished, callback will be called. You can then call downsync.end to get
the result of the operation.
| this | |
| expression |
search expression describing which set of messages to downsync (null for all) |
| io_priority |
the I/O priority of the request |
| cancellable |
optional Cancellable object, or null |
| callback |
a TaskReadyCallback to call when the request is satisfied |
| user_data |
data to pass to the callback function |