private async void radGridView1_RowSourceNeededAsync(object sender, GridViewRowSourceNeededEventArgs e)
        {
            MainJobObject mainJobObject = e.ParentRow.DataBoundItem as MainJobObject;

            //make the RESTAPI call here to retrieve the attachments of this job
            List<IJobDocument> mainJobObjectAttachments = await FillMainJobObjectWithAttachmentsFromBackend(mainJobObject.JobId);

            foreach (IJobDocument attachment in mainJobObjectAttachments)
            {
                GridViewRowInfo row = e.Template.Rows.NewRow();
                row.Cells["MainJobID"].Value = mainJobObject.JobId;
                row.Cells["Status"].Value = attachment.StatusObject.Status;
                row.Cells["UploadDate"].Value = attachment.StatusObject.UploadDate;
                row.Cells["AttachmentID"].Value = attachment.IJobDocumentId;
                row.Cells["AttachmentType"].Value = attachment.AttachmentType;
                row.Cells["ServisnyTechnik"].Value = attachment.ServisnyTechnik;
                row.ErrorText = attachment.Error;

                e.SourceCollection.Add(row);
            }
        }

        public class MyCodeMessageItemElement : TextMessageItemElement
        {
            protected override Type ThemeEffectiveType
            {
                get
                {
                    return typeof(TextMessageItemElement);
                }
            }

            protected override LightVisualElement CreateMainMessageElement()
            {
                return new CustomCodeMessageBubbleElement();
            }

            public override void Synchronize()
            {
                base.Synchronize();
                CustomCodeMessageBubbleElement bubble = this.MainMessageElement as CustomCodeMessageBubbleElement;
                bubble.DrawText = false;
            }
        }



        public class CustomCodeMessageBubbleElement : ChatMessageBubbleElement
        {
            protected override Type ThemeEffectiveType
            {
                get
                {
                    return typeof(ChatMessageBubbleElement);
                }
            }

            //RadTextBoxControlElement textBoxElement;
            RadSyntaxEditor radSyntaxEditor;
            RadSyntaxEditorElement radSyntaxEditorElement;

            public RadSyntaxEditor SyntaxEditor1
            {
                get
                {
                    return this.radSyntaxEditor;
                }
            }

            protected override void CreateChildElements()
            {
                base.CreateChildElements();
                radSyntaxEditorElement = new RadSyntaxEditorElement();
                radSyntaxEditorElement.ZoomComboBox.Enabled = false;
                //radSyntaxEditor.ContextMenuOpening += textBoxElement_ContextMenuOpening;
                this.Children.Add(radSyntaxEditorElement);
            }

            //private void textBoxElement_ContextMenuOpening(object sender, TreeBoxContextMenuOpeningEventArgs e)
            //{
            //    foreach (RadItem item in e.ContextMenu.Items)
            //    {
            //        if (item.Text.Contains("&Copy"))
            //        {
            //            item.Visibility = ElementVisibility.Visible;
            //        }
            //        else
            //        {
            //            item.Visibility = ElementVisibility.Collapsed;
            //        }
            //    }
            //}

            public override string Text
            {
                get
                {
                    return base.Text;
                }
                set
                {
                    base.Text = value;
                    this.radSyntaxEditor.Text = value;
                }
            }
        }