indexing description: "Objects that ..." author: "" date: "$Date$" revision: "$Revision$" deferred class WIKI_WITH_CHILD feature -- Access pages: ARRAYED_LIST [WIKIPAGE] feature -- Status report is_valid_page (p: WIKIPAGE): BOOLEAN do Result := p /= Void end feature -- Element change add_page (p: WIKIPAGE) require is_valid_page: is_valid_page (p) do if pages = Void then create pages.make (10) end pages.extend (p) end end