Asynchronously close the DTLS connection. See gio.dtls_connection.DtlsConnection.close for more information.
the [I/O priority][io-priority] of the request
a #GCancellable, or null
callback to call when the close operation is complete
Asynchronously close the DTLS connection. See gio.dtls_connection.DtlsConnection.close for more information.