extjs - Tab Panel in Panel -


i trying place tabpanel in panel. tabpanel appears functionality broken. displays both tab's content @ same time , clicking different tabs nothing. how adding tabpanel

var tabpanel =          ext.create('ext.tabpanel', {             fullscreen: true,             layout: 'fit',             defaults: {                 stylehtmlcontent: true             },               items: [                 {                     title: 'home',                     html: 'home screen'                 },                 {                     title: 'contact',                     html: 'contact screen'                 }             ]         }); this.add([ toptoolbar, tabpanel, bottomtoolbar ]);

solved missing 

fullscreen: true,

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