public function unassignDisplay($displayId)
    {
        $this->getLogger()->info('Unassigning display ID ' . json_encode($displayId) . ' From display Group ID ' . $this->displayGroupId);
        $this->doPost('/displaygroup/' . $this->displayGroupId . '/display/unassign', [
            'displayId' => $displayId
            ]);

        return $this;
    }