/**
  * Strict request validation
  *
  * @param RequestInterface $request
  *
  * @throws ViolationListException
  */
 private function strictRequestValidate(RequestInterface $request)
 {
     $requestMetadata = $this->validator->getMetadataFor($request);
     $useStrictGroup = false;
     // Search constraints by group "Strict"
     if ($requestMetadata instanceof ClassMetadata) {
         foreach ($requestMetadata->getConstrainedProperties() as $propertyName) {
             $propertyMetadata = $requestMetadata->getPropertyMetadata($propertyName);
             if (count($propertyMetadata)) {
                 $propertyMetadata = array_shift($propertyMetadata);
             } else {
                 continue;
             }
             $constraintsInStrictGroup = $propertyMetadata->findConstraints('Strict');
             if (count($constraintsInStrictGroup)) {
                 $useStrictGroup = true;
                 break;
             }
         }
     }
     if ($useStrictGroup) {
         // The any properties in request class have a "Strict" group validation
         $violationList = $this->validator->validate($request, null, ['Strict']);
         if (count($violationList)) {
             throw ViolationListException::create($violationList);
         }
         return;
     }
     if ($this->validator instanceof VarTagValidatorInterface) {
         $violationList = $this->validator->validateObjectByVarTags($request);
         if (count($violationList)) {
             throw ViolationListException::create($violationList);
         }
     }
 }