drag_set_icon_surface

function drag_set_icon_surface(context:Gdk.DragContext, surface:cairo.Surface):void {
    // Gjs wrapper for gtk_drag_set_icon_surface()
}

Sets surface as the icon for a given drag. GTK+ retains references for the arguments, and will release them when they are no longer needed.

To position the surface relative to the mouse, use cairo_surface_set_device_offset() on surface. The mouse cursor will be positioned at the (0,0) coordinate of the surface.