or null if the #WebKitContextMenu is empty.
ContextMenu.first
webkit.context_menu_item.ContextMenuItem first() nothrowGets the first item in the menu.
Returns
the first #WebKitContextMenuItem of menu,
webkit.context_menu_item.ContextMenuItem first() nothrowGets the first item in the menu.
or null if the #WebKitContextMenu is empty.