nl_tokens: Returns the item that is currently active inside this TabPanel .
pl_tokens: function ( ) { var me = this , // Ensure the calculated result references a Component result = me . getComponent ( <mask> . activeTab ) ; // Sanitize the result in case the active tab is no longer there. if ( result && me . items . indexOf ( result ) != - 1 ) { me . activeTab = result ; } else { me . activeTab = null ; } return me . activeTab ; }