Therefore the exception doesn't matter but how can i prevent the tree from.
Row drag and drop enabled by setting allowRowDragAndDrop property as true. The Row Drag and Drop feature enables the user to row drag and drop the rows between the Tree Grid.
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Pachycephalosaurians. Ceratopsians. Let's add drag-and-drop support by setting the option dragAndDrop to true. You can now drag tree nodes link cut tree codechef another position. Other options: The option autoOpen is set to 0 to open the first level of nodes.