code: function(oData) {
      if(!lang.isValue(oData) || (oData === "")) {
          return null;
      }
  
      //Convert to number
      var number = oData * 1;
      
      // Validate
      if(lang.isNumber(number)) {
          return number;
      }
      else {
          return null;
      }
  }
docs: Converts data to type Number.
  
  @method DataSourceBase.parseNumber
  @param oData {String | Number | Boolean} Data to convert. Note, the following
  values return as null: null, undefined, NaN, "".
  @return {Number} A number, or null.
  @static