I’m using msgraph sdk for java (6.10). According to doc, when I want to list content of the folder in sharepoint, I can use something like this:

DriveItem root = graphClient.drives().byDriveId(driveId).root().get();
List<DriveItem> children = root.getChildren();

However, when I try to do that in my app, my children list is null. On the other hand, when I will do like this:

DriveItem root = graphClient.drives().byDriveId(driveId).root().get();
root.getFolder().getChildCount()

Child count will be appropriate (so it will show good amount).

So I’m not sure why I can’t get driveitems in my first snippet?