Opc.Ua.Server.CoreNodeManager.ReferenceSharedNode C# (CSharp) Method

        public ILocalNode ReferenceSharedNode(
            ILocalNode    source,
            NodeId        referenceTypeId,
            bool          isInverse,
            QualifiedName browseName)
        {     
            try
            {
                m_lock.Enter();

                // find the instance declaration identified bt the browse name.
                ILocalNode target = FindInstanceDeclaration(source, browseName);

                if (target == null)
                {
                    return null;
                }

                // find the references to the model parent for the instance declaration.
                ExpandedNodeId parentId = target.References.FindTarget(ReferenceTypeIds.HasModelParent, false, false, null, 0);
                           
                if (!NodeId.IsNull(parentId))
                {
                    IList<IReference> references = target.References.FindReferencesToTarget(parentId);
                    
                    foreach (IReference reference in references)
                    {
                        if (reference.ReferenceTypeId == ReferenceTypeIds.HasModelParent)
                        {
                            continue;
                        }

                        source.References.Add(reference.ReferenceTypeId, !reference.IsInverse, target.NodeId);
                        target.References.Add(reference.ReferenceTypeId, reference.IsInverse, source.NodeId);
                    }
                }
                
                // add basic reference.
                source.References.Add(referenceTypeId, isInverse, target.NodeId);
                target.References.Add(referenceTypeId, !isInverse, source.NodeId);

                // return child.
                return target;
            }
            finally
            {
                m_lock.Exit();
            } 
        }