/// <summary>
        /// Finds the child with the specified browse name.
        /// </summary>
        protected override BaseInstanceState FindChild(
            ISystemContext context,
            QualifiedName browseName,
            bool createOrReplace,
            BaseInstanceState replacement)
        {
            if (QualifiedName.IsNull(browseName))
            {
                return null;
            }

            BaseInstanceState instance = null;

            switch (browseName.Name)
            {
                case Opc.Ua.Gds.BrowseNames.CertificateGroups:
                {
                    if (createOrReplace)
                    {
                        if (CertificateGroups == null)
                        {
                            if (replacement == null)
                            {
                                CertificateGroups = new CertificateGroupFolderState(this);
                            }
                            else
                            {
                                CertificateGroups = (CertificateGroupFolderState)replacement;
                            }
                        }
                    }

                    instance = CertificateGroups;
                    break;
                }

                case Opc.Ua.Gds.BrowseNames.StartSigningRequest:
                {
                    if (createOrReplace)
                    {
                        if (StartSigningRequest == null)
                        {
                            if (replacement == null)
                            {
                                StartSigningRequest = new StartSigningRequestMethodState(this);
                            }
                            else
                            {
                                StartSigningRequest = (StartSigningRequestMethodState)replacement;
                            }
                        }
                    }

                    instance = StartSigningRequest;
                    break;
                }

                case Opc.Ua.Gds.BrowseNames.StartNewKeyPairRequest:
                {
                    if (createOrReplace)
                    {
                        if (StartNewKeyPairRequest == null)
                        {
                            if (replacement == null)
                            {
                                StartNewKeyPairRequest = new StartNewKeyPairRequestMethodState(this);
                            }
                            else
                            {
                                StartNewKeyPairRequest = (StartNewKeyPairRequestMethodState)replacement;
                            }
                        }
                    }

                    instance = StartNewKeyPairRequest;
                    break;
                }

                case Opc.Ua.Gds.BrowseNames.FinishRequest:
                {
                    if (createOrReplace)
                    {
                        if (FinishRequest == null)
                        {
                            if (replacement == null)
                            {
                                FinishRequest = new FinishRequestMethodState(this);
                            }
                            else
                            {
                                FinishRequest = (FinishRequestMethodState)replacement;
                            }
                        }
                    }

                    instance = FinishRequest;
                    break;
                }

                case Opc.Ua.Gds.BrowseNames.GetCertificateGroups:
                {
                    if (createOrReplace)
                    {
                        if (GetCertificateGroups == null)
                        {
                            if (replacement == null)
                            {
                                GetCertificateGroups = new GetCertificateGroupsMethodState(this);
                            }
                            else
                            {
                                GetCertificateGroups = (GetCertificateGroupsMethodState)replacement;
                            }
                        }
                    }

                    instance = GetCertificateGroups;
                    break;
                }

                case Opc.Ua.Gds.BrowseNames.GetTrustList:
                {
                    if (createOrReplace)
                    {
                        if (GetTrustList == null)
                        {
                            if (replacement == null)
                            {
                                GetTrustList = new GetTrustListMethodState(this);
                            }
                            else
                            {
                                GetTrustList = (GetTrustListMethodState)replacement;
                            }
                        }
                    }

                    instance = GetTrustList;
                    break;
                }

                case Opc.Ua.Gds.BrowseNames.GetCertificateStatus:
                {
                    if (createOrReplace)
                    {
                        if (GetCertificateStatus == null)
                        {
                            if (replacement == null)
                            {
                                GetCertificateStatus = new GetCertificateStatusMethodState(this);
                            }
                            else
                            {
                                GetCertificateStatus = (GetCertificateStatusMethodState)replacement;
                            }
                        }
                    }

                    instance = GetCertificateStatus;
                    break;
                }
            }

            if (instance != null)
            {
                return instance;
            }

            return base.FindChild(context, browseName, createOrReplace, replacement);
        }