Gtk.Widget.prototype.drag_dest_find_target

function drag_dest_find_target(context:Gdk.DragContext, target_list:Gtk.TargetList):Gdk.Atom {
    // Gjs wrapper for gtk_drag_dest_find_target()
}

Looks for a match between the supported targets of context and the @dest_target_list, returning the first matching target, otherwise returning %GDK_NONE. @dest_target_list should usually be the return value from Gtk.drag_dest_get_target_list, but some widgets may have different valid targets for different parts of the widget; in that case, they will have to implement a drag_motion handler that passes the correct target list to this function.