$ cat /usr/share/polkit-1/rules.d/org.gtk.vfs.file-operations.rules
// Allows users belonging to privileged group to start gvfsd-admin without
// authorization. This prevents redundant password prompt when starting
// gvfsd-admin. The gvfsd-admin causes another password prompt to be shown
// for each client process using the different action id and for the subject
// based on the client process.
polkit.addRule(function(action, subject) {
        if ((action.id == "org.gtk.vfs.file-operations-helper") &&
            subject.local &&
            subject.active &&
            subject.isInGroup ("wheel")) {
            return polkit.Result.YES;
        }
});