Found out myself
{ id: 'app', view: 'layout',
rows: [
{ view: 'layout', type: 'clear',
rows: [
{ view: 'scrollview', scroll: 'x', scrollSpeed: '3ms',
content: {
view: 'toolbar',
type: 'SubBar',
width:800,
elements: [
{ view: 'button', label: 'Button', popup: '', click: '', css: '', id: 'control_button_2', width: 100},
{ view: 'button', label: 'Button', popup: '', click: '', css: '', id: 'control_button_3', width: 100},
{ view: 'button', label: 'Button', popup: '', click: '', css: '', id: 'control_button_4', width: 100},
{ view: 'button', label: 'Button', popup: '', click: '', css: '', id: 'control_button_5', width: 100},
{ view: 'button', label: 'Button', popup: '', click: '', css: '', id: 'control_button_6'},
{ view: 'button', label: 'Button', popup: '', click: '', css: '', id: 'control_button_7'},
{ view: 'button', label: 'Button', popup: '', click: '', css: '', id: 'control_button_8'},
{ view: 'button', label: 'Button', popup: '', click: '', css: '', id: 'control_button_9'},
{ view: 'button', label: 'Button', popup: '', click: '', css: '', id: 'control_button_10'},
{ view: 'button', label: 'Button', popup: '', click: '', css: '', id: 'control_button_11'},
{ view: 'button', label: 'Button', popup: '', click: '', css: '', id: 'control_button_12'},
{ view: 'button', label: 'Button', popup: '', click: '', css: '', id: 'control_button_13'}
]
, id: 'content_2'
}, id: 'scrollview_2'
},
{ view: 'view', id: 'temp_designer_view_3'},
{ view: 'view', id: 'temp_designer_view_4'}
], id: 'layout_2'
}
]
}