hide the folder & leaf image for tree column

One of my column types in dhtmlxgrid is “tree”. This is all working fine. However I have few rows which do not have any subitems. For these rows also the folder/leaf image is showing up. How can I hide this image?

Thanks

Unfortunately it’s not available to disable images for a specific row.
The only way - use the blank image.
grid.setItemImage(rowId,“codebase/imgs/blank.gif”)