Asynchrously replaces the signature file for this with the given contents of length
bytes.
The signature file for this is given by get_file.
When the operation is finished, callback will be called. You can then call mail_signature_replace.end
to get the result of the operation.
| this |
an Source |
| contents |
the signature contents |
| length |
the length of |
| 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 |