public function testGetVariableInstancesWithGet()
 {
     $restService = new camundaRestClient(self::$restApi);
     $vi = $restService->getVariableInstances();
     $i = 0;
     foreach ($vi as $data) {
         if ($data->name == 'serializableVar') {
             $i++;
         }
     }
     $this->assertGreaterThan(0, $i);
     $restService = new camundaRestClient(self::$restApi);
     $vi = $restService->getVariableInstances(null, true);
     $i = 0;
     foreach ($vi as $data) {
         if ($data->name == 'serializableVar') {
             $i++;
         }
     }
     $this->assertGreaterThan(0, $i);
     $restService = new camundaRestClient(self::$restApi);
     $vir = array('variableName' => 'amount');
     $vi = $restService->getVariableInstances($vir, true);
     $this->assertGreaterThan(0, count($vi));
 }