Usage of HibernateValidator Impl classes in SimpleViolationsContainer

import org.hibernate.validator.internal.engine.path.NodeImpl;
import org.hibernate.validator.internal.metadata.descriptor.ConstraintDescriptorImpl;

// method

private static boolean compareNode(Node n1, Node n2)
      if (!(n1 instanceof NodeImpl))
      {
         return false;
      }
      NodeImpl ni1 = (NodeImpl) n1;
      NodeImpl ni2 = (NodeImpl) n2;
      if (ni1.getIndex() == null)
      {
         if (ni2.getIndex() != null)
         {
            return false;
         }
      }

// method

static boolean compareConstraintViolation(ConstraintViolation<?> cv1, ConstraintViolation<?> cv2)

if (cv1.getConstraintDescriptor() instanceof ConstraintDescriptorImpl && cv2.getConstraintDescriptor() instanceof ConstraintDescriptorImpl)
      {
         ConstraintDescriptorImpl<?> cdi1 = (ConstraintDescriptorImpl<?>) cv1.getConstraintDescriptor();
         ConstraintDescriptorImpl<?> cdi2 = (ConstraintDescriptorImpl<?>) cv2.getConstraintDescriptor();
         if (cdi1.getElementType() != null ? !cdi1.getElementType().equals(cdi2.getElementType()) : cdi2.getElementType() != null) {
            return false;
         }
      }