public function testGetBpmnXml()
 {
     $restClient = new camundaRestClient(self::$restApi);
     $pdi = $restClient->getProcessDefinitions()[0]->id;
     $processXml = $restClient->getBpmnXml($pdi);
     $this->assertEquals($pdi, $processXml->id);
     $this->assertGreaterThan(50, strlen($processXml->bpmn20Xml));
 }