Gck.Object.prototype.get_data_finish

function get_data_finish(result: Gio.AsyncResult): [return_value: ByteArray, n_data: Number(gsize)] {
    // Gjs wrapper for gck_object_get_data_finish()
}

Get the result of an operation to get attribute data from an object. For convenience the returned data has an extra null terminator, not included in the returned length.

result: The result passed to the callback.
return_value: The PKCS\#11 attribute data or null if an error occurred.
n_data: The length of the resulting data.