nl_tokens: Called when an list item has been tapped .
pl_tokens: function ( list , index , target , record , e ) { var <mask> = this , store = list . getStore ( ) , node = store . getAt ( index ) ; me . fireEvent ( 'itemtap' , this , list , index , target , record , e ) ; if ( node . isLeaf ( ) ) { me . fireEvent ( 'leafitemtap' , this , list , index , target , record , e ) ; me . goToLeaf ( node ) ; } else { this . goToNode ( node ) ; } }