Asynchronously look up the issuer of certificate
in the database.
See lookup_certificate_issuer for more information.
this | |
certificate | |
interaction |
used to interact with the user if necessary |
flags |
flags which affect the lookup operation |
cancellable |
a Cancellable, or null |
callback |
callback to call when the operation completes |
user_data |
the data to pass to the callback function |