Is it possible to have the + icon (indicating that the node can be expanded) set without children in the node. And add the children only when the user clicks on it (in the expanding event).
This feature is presently not available in the current implementation of the TreeViewAdv control. However, we have considered this as a feature request (QA report# 733) for a future release of Essential Suite. We appreciate your feedback, and thanks for your continued interest in Syncfusion products.