 
   setNegativeInfinitySymbol: (negativeInfinitySymbol) ->
     @_negativeInfinitySymbol = negativeInfinitySymbol
+    return this
 
   negativePrefix: ->
     @_get 'negativePrefix'


  setNotANumberSymbol: (notANumberSymbol) ->
    @_notANumberSymbol = notANumberSymbol

  nullSymbol: ->
    @_get 'nullSymbol'

  setNullSymbol: (nullSymbol) ->
    @_nullSymbol = nullSymbol

  numberStyle: ->
    @_numberStyle


  setUsesGroupingSeparator: (usesGroupingSeparator) ->
    @_usesGroupingSeparator = usesGroupingSeparator
    return this

  zeroSymbol: ->
    @_get 'zeroSymbol'

  setZeroSymbol: (zeroSymbol) ->
    @_zeroSymbol = zeroSymbol
    return this

  _get: (attr) ->
    value = this["_#{attr}"]
