code: void setLink(Node node, Relation relation, Node childNode, NodeLink nodeLink)
      {
          nodeLink.setMultiplicity(relation.getType());
  
          EntityMetadata metadata = KunderaMetadataManager.getEntityMetadata(node.getPersistenceDelegator()
                  .getKunderaMetadata(), node.getDataClass());
          nodeLink.setLinkProperties(getLinkProperties(metadata, relation, node.getPersistenceDelegator()
                  .getKunderaMetadata()));
  
          // Add Parent node to this child
          childNode.addParentNode(nodeLink, node);
  
          // Add child node to this node
          node.addChildNode(nodeLink, childNode);
      }
docs: Set link property
  
  @param node
  node
  @param relation
  relation
  @param childNode
  target node
  @param nodeLink
  node link(bridge)