true, if data loading is deferred; otherwise, false.
If the AllowCascadeTreeCreation property is set to false, the grid loads rows that should be displayed on start all at once. This may take a lot of time, especially if there are complex templates in data cells. To speed up the grid's performance on the initial data load, enable the AllowCascadeTreeCreation option. In this instance, rows are displayed one by one, with a delay. To provide visual feedback, the grid plays an animation while the data is being retrieved.