Improve CMS_LINK to easily add children

draft/application/cms/src/kernel/link/cms_link.e

@@ -32,6 +32,10 @@ feature -- status report
 		deferred
 		end
 
+	has_children: BOOLEAN
+		deferred
+		end
+
 feature -- Query
 
 	parent: detachable CMS_LINK

draft/application/cms/src/kernel/link/cms_local_link.e

@@ -33,12 +33,29 @@ feature -- Status report
 
 	is_expandable: BOOLEAN
 
+	has_children: BOOLEAN
+		do
+			Result := attached children as l_children and then not l_children.is_empty
+		end
+
 	permission_arguments: detachable ITERABLE [STRING]
 
 	children: detachable LIST [CMS_LINK]
 
 feature -- Element change
 
+	add_link (lnk: CMS_LINK)
+		local
+			lst: like children
+		do
+			lst := children
+			if lst = Void then
+				create {ARRAYED_LIST [CMS_LINK]} lst.make (1)
+				children := lst
+			end
+			lst.force (lnk)
+		end
+
 	set_children (lst: like children)
 		do
 			children := lst
@@ -47,11 +64,17 @@ feature -- Element change
 	set_expanded (b: like is_expanded)
 		do
 			is_expanded := b
+			if b then
+				is_expandable := True
+			end
 		end
 
 	set_expandable (b: like is_expandable)
 		do
 			is_expandable := b
+			if not b then
+				is_expanded := False
+			end
 		end
 
 	get_is_active (req: WSF_REQUEST)