void netconfig_error_fail_get_sim_auth_delay(GDBusMethodInvocation *context);
void netconfig_error_fail_save_congifuration(GDBusMethodInvocation *context);
void netconfig_error_fail_ethernet_cable_state(GDBusMethodInvocation *context);
+void netconfig_error_fail_preferred_ipv6_address(GDBusMethodInvocation *context);
void netconfig_error_dbus_method_return(GDBusMethodInvocation *context, netconfig_error_e error, const gchar *message);
void netconfig_error_init(void);