diff --git a/tabbedcontainer.go b/tabbedcontainer.go
index d1f2cd0..784ce69 100644
--- a/tabbedcontainer.go
+++ b/tabbedcontainer.go
@@ -4,8 +4,12 @@ import "git.tebibyte.media/tomo/tomo"
 import "git.tebibyte.media/tomo/tomo/input"
 import "git.tebibyte.media/tomo/objects/layouts"
 
+var _ tomo.Object = new(TabbedContainer)
+
+// TODO doc this!
+
 type TabbedContainer struct {
-	tomo.ContainerBox
+	box tomo.ContainerBox
 	
 	leftSpacer  tomo.Box
 	rightSpacer tomo.Box
@@ -15,36 +19,41 @@ type TabbedContainer struct {
 }
 
 func NewTabbedContainer () *TabbedContainer {
-	container := &TabbedContainer {
-		ContainerBox: tomo.NewContainerBox(),
+	tabbedContainer := &TabbedContainer {
+		box: tomo.NewContainerBox(),
 	}
-	container.SetRole(tomo.R("objects", "TabbedContainer"))
-	container.SetAttr(tomo.ALayout(layouts.Column { false, true }))
+	tabbedContainer.box.SetRole(tomo.R("objects", "TabbedContainer"))
+	tabbedContainer.box.SetAttr(tomo.ALayout(layouts.Column { false, true }))
 	
-	container.tabsRow = tomo.NewContainerBox()
-	container.tabsRow.SetRole(tomo.R("objects", "TabRow"))
-	container.Add(container.tabsRow)
+	tabbedContainer.tabsRow = tomo.NewContainerBox()
+	tabbedContainer.tabsRow.SetRole(tomo.R("objects", "TabRow"))
+	tabbedContainer.box.Add(tabbedContainer.tabsRow)
 	
-	container.leftSpacer = tomo.NewBox()
-	container.leftSpacer.SetRole(tomo.R("objects", "TabSpacer"))
-	container.leftSpacer.SetTag("left", true)
-	container.rightSpacer = tomo.NewBox()
-	container.rightSpacer.SetRole(tomo.R("objects", "TabSpacer"))
-	container.rightSpacer.SetTag("left", true)
+	tabbedContainer.leftSpacer = tomo.NewBox()
+	tabbedContainer.leftSpacer.SetRole(tomo.R("objects", "TabSpacer"))
+	tabbedContainer.leftSpacer.SetTag("left", true)
+	tabbedContainer.rightSpacer = tomo.NewBox()
+	tabbedContainer.rightSpacer.SetRole(tomo.R("objects", "TabSpacer"))
+	tabbedContainer.rightSpacer.SetTag("left", true)
 	
-	container.ClearTabs()
-	container.setTabRowLayout()
-	return container
+	tabbedContainer.ClearTabs()
+	tabbedContainer.setTabRowLayout()
+	return tabbedContainer
+}
+
+// GetBox returns the underlying box.
+func (this *TabbedContainer) GetBox () tomo.Box {
+	return this.box
 }
 
 func (this *TabbedContainer) Activate (name string) {
 	if _, tab := this.findTab(this.active); tab != nil {
 		tab.setActive(false)
-		this.Remove(tab.root)
+		this.box.Remove(tab.root)
 	}
 	if _, tab := this.findTab(name); tab != nil {
 		tab.setActive(true)
-		this.Add(tab.root)
+		this.box.Add(tab.root)
 	} else {
 		name = ""
 	}