public IQueryable<Node> GetNodes(int parentNodeId, List<int> orgIds)
        {
            var orgNodeIds = new List<int>();

            var docs = _db.Documents.Select(ldoc => Mapper.Map<LinqDocument, Document>(ldoc));
            foreach(var doc in docs)
            {
                foreach(var docOrgId in doc.DocumentOrganisations)
                {
                    foreach(var orgId in orgIds)
                    {
                        if(docOrgId.OrganisationId == orgId)
                        {
                            if(!orgNodeIds.Contains(doc.NodeId))
                                orgNodeIds.Add(doc.NodeId);
                        }
                    }
                }
             }

            var nodes = _db.Nodes.Where(x => x.ParentId == parentNodeId).Select(lnode => Mapper.Map<LinqNode, Node>(lnode));
            var returnNodes = new List<Node>();

            foreach(var node in nodes)
            {
                if (includeThis(orgNodeIds, node)) { returnNodes.Add(node); }
                else {
                    foreach (var childNode in GetNodes(node.NodeId))
                    {
                        if (includeThis(orgNodeIds, childNode)) { returnNodes.Add(node); }
                        else
                        {
                            foreach (var subChildNode in GetNodes(node.NodeId))
                            {
                                if (includeThis(orgNodeIds, childNode)) { returnNodes.Add(node); }
                            }
                        }

                    }
                }