TlsDatabase.lookupCertificateIssuerAsync

void lookupCertificateIssuerAsync(gio.tls_certificate.TlsCertificate certificate,  gio.tls_interaction.TlsInteraction interaction,  gio.types.TlsDatabaseLookupFlags flags,  gio.cancellable.Cancellable cancellable =  null,  gio.types.AsyncReadyCallback callback =  null)

Asynchronously look up the issuer of certificate in the database. See [gio.tls_database.TlsDatabase.lookupCertificateIssuer] for more information.

Parameters

`certificate`	a #GTlsCertificate
`interaction`	used to interact with the user if necessary
`flags`	flags which affect the lookup operation
`cancellable`	a #GCancellable, or null
`callback`	callback to call when the operation completes