gistfile1.txt

 mainPane: SC.MainPane.design({
        childViews: "workspaceView".w(),

        workspaceView: SC.WorkspaceView.design({

            topToolbar: SC.ToolbarView.design({
                childViews: "backButtonView forwardButtonView ".w(),

                backButtonView: SC.LabelView.design({
                    layout: { left: 10, width: 24, height: 24 },
                    icon: "sc-icon-left-24"
                }),

                forwardButtonView: SC.LabelView.design({
                    layout: { left: 50, width: 24, height: 24 },
                    icon: "sc-icon-right-24"
                })
            }),

            contentView: SC.TabView.design({

            })
        })
    })