code: function(FieldClass) {
        for(var type in this.typeClasses) {
           if(this.typeClasses.hasOwnProperty(type) ) {
              if(this.typeClasses[type] == FieldClass) {
                 return type;
              }
           }
        }
        return null;
     }
docs: Get the inputex type for the given class (ex: <code>inputEx.getType(inputEx.ColorField)</code> returns "color")
  @static
  @param {inputEx.Field} FieldClass An inputEx.Field or derivated class
  @return {String} returns the inputEx type string or <code>null</code>