item or null if item doesn't have a submenu.
ContextMenuItem.getSubmenu
webkitwebprocessextension.context_menu.ContextMenu getSubmenu()Gets the submenu of item.
Returns
the #WebKitContextMenu representing the submenu of
webkitwebprocessextension.context_menu.ContextMenu getSubmenu()Gets the submenu of item.
item or null if item doesn't have a submenu.