     
      /**
      *  Callback function that formats the value displayed
-     *  in the textDisplay field.
+     *  in the skin's <code>textDisplay</code> property.
      *  The function takes a single Number as an argument
      *  and returns a formatted String.
      *

     /**
     *  Callback function that extracts the numeric 
     *  value from the displayed value in the 
     *  textDisplay field.  
     * 
     *  The function takes a single String as an argument
     *  and returns a Number.

 *  component, or steps the NumericStepper by pressing an arrow button
 *  or by calling the <code>changeValueByStep()</code> method.</p>
 *
 *  @mxml
 *
 *  <p>The <code>&lt;NumericStepper&gt;</code> tag inherits all of the tag 
 *  attributes of its superclass and adds the following tag attributes:</p>
 *
 *  <pre>
 *  &lt;NumericStepper
 *
 *    <strong>Properties</strong>
 *    imeMode="null"
 *    maxChars="0"
 *    maximum="10"
 *    valueFormatFunction=""
 *    valueParseFunction=""
 *
 *    <strong>Styles</strong>
 *
*    alignmentBaseline="USE_DOMINANT_BASELINE"
*    baselineShift="0.0"
*    blockProgression="TB"
*    breakOpportunity="AUTO"
*    cffHinting="HORIZONTAL_STEM"
*    color="0"
*    contentBackgroundColor=""
*    digitCase="DEFAULT"
*    digitWidth="DEFAULT"
*    direction="LTR"
*    dominantBaseline="AUTO"
*    firstBaselineOffset="AUTO"
*    focusedTextSelectionColor=""
*    fontFamily="Times New Roman"
*    fontLookup="DEVICE"
*    fontSize="12"
*    fontStyle="NORMAL"
*    fontWeight="NORMAL"
*    inactiveTextSelection=""
*    justificationRule="AUTO"
*    justificationStyle="AUTO"
*    kerning="AUTO"
*    leadingModel="AUTO"
*    ligatureLevel="COMMON"
*    lineHeight="120%"
*    lineThrough="false"
*    locale="en"
*    paragraphEndIndent="0"
*    paragraphSpaceAfter="0"
*    paragraphSpaceBefore="0"
*    paragraphStartIndent="0"
*    renderingMode="CFF"
*    tabStops="null"
*    textAlign="START"
*    textAlignLast="START"
*    textAlpha="1"
*    textDecoration="NONE"
*    textIndent="0"
*    textJustify="INTER_WORD"
*    textRotation="AUTO"
*    trackingLeft="0"
*    trackingRight="0"
*    typographicCase="DEFAULT"
*    unfocusedTextSelectionColor=""
*    whiteSpaceCollapse="COLLAPSE"
*  /&gt;
*  </pre>
*
 *  @see spark.components.Spinner
 *  @see spark.skins.spark.NumericStepperSkin
 *  @see spark.skins.spark.NumericStepperTextInputSkin
 * 
 *  @includeExample examples/NumericStepperExample.mxml
 *  
