nl_tokens: Remove an item from the collection .
pl_tokens: function ( item ) { var index = this . items . indexOf ( item ) ; if ( index === - 1 ) { Ext . Array . remove ( this . all , item ) ; if ( typeof this . getKey == 'function' ) { var key = this . getKey ( item ) ; if ( key !== undefined ) { delete this . map [ key ] ; } } return <mask> ; } return this . removeAt ( this . items . indexOf ( item ) ) ; }