id ?? null; if (isset($id)) { return "/_ml/data_frame/analytics/$id/_preview"; } return "/_ml/data_frame/analytics/_preview"; } public function getParamWhitelist(): array { return []; } public function getMethod(): string { return isset($this->body) ? 'POST' : 'GET'; } public function setBody($body): PreviewDataFrameAnalytics { if (isset($body) !== true) { return $this; } $this->body = $body; return $this; } }