nl_tokens: Custom implementation of walkCells which only goes up and down .
pl_tokens: function ( pos , direction , e , preventWrap , verifierFn , scope ) { if ( direction == 'left' ) { direction = 'up' ; } else if ( direction == 'right' ) { direction = 'down' ; } pos = Ext . view . Table . prototype . walkCells . call ( this , pos , direction , e , preventWrap , verifierFn , scope ) ; if ( <mask> && ! pos . column ) { pos . column = 1 ; } return pos ; }