$nickname_arg = $this->arg('nickname');
if (empty($nickname_arg)) {
// TRANS: Client error displayed when requesting Friends of a Friend feed without providing a user nickname.
$this->clientError(_('No such user.'), 404);
$nickname_arg = $this->arg('nickname');
if (empty($nickname_arg)) {
// TRANS: Client error displayed when requesting Friends of a Friend feed without providing a user nickname.
$this->clientError(_('No such user.'), 404);