/**
                             * The Form Builder Field Base Component
                             *
                             * @module aui-form-field
                             * @submodule aui-form-field-required
                             */
                            
                            var CSS_FIELD_REQUIRED = A.getClassName('form', 'field', 'required'),
                                CSS_FIELD_TITLE = A.getClassName('form', 'field', 'title');
                            
                            /**
                             * An augmentation class which adds the required funcionality to form fields.
                             *
                             * @class A.FormFieldRequired
                             * @param {Object} config Object literal specifying widget configuration
                             *     properties.
                             * @constructor
                             */
                            A.FormFieldRequired = function() {};
                            
                            A.FormFieldRequired.prototype = {
                                TPL_REQUIRED: '<span class="' + CSS_FIELD_REQUIRED + '">*</span>',
                            
                                /**
                                 * Constructor for the `A.FormFieldRequired` component. Lifecycle.
                                 *
                                 * @method initializer
                                 * @protected
                                 */
                                initializer: function() {
                                    this._uiSetRequired(this.get('required'));
                            
                                    this.after({
                                        requiredChange: this._afterRequiredChange
                                    });
                                },
                            
                                /**
                                 * Fired after the `required` attribute is set.
                                 *
                                 * @method _afterRequiredChange
                                 * @protected
                                 */
                                _afterRequiredChange: function() {
                                    this._uiSetRequired(this.get('required'));
                                },
                            
                                /**
                                 * Updates the ui according to the value of the `required` attribute.
                                 *
                                 * @method _uiSetRequired
                                 * @param {String} required
                                 * @protected
                                 */
                                _uiSetRequired: function(required) {
                                    var titleNode = this.get('content').one('.' + CSS_FIELD_TITLE);
                            
                                    if (required) {
                                        titleNode.append(this.TPL_REQUIRED);
                                    } else {
                                        if (titleNode.one('.' + CSS_FIELD_REQUIRED)) {
                                            titleNode.one('.' + CSS_FIELD_REQUIRED).remove(true);
                                        }
                                    }
                                }
                            };
                            
                            
                            /**
                             * Static property used to define the default attribute configuration
                             * for the `A.FormFieldRequired`.
                             *
                             * @property ATTRS
                             * @type Object
                             * @static
                             */
                            A.FormFieldRequired.ATTRS = {
                                /**
                                 * Flag indicating if this field is required.
                                 *
                                 * @attribute required
                                 * @default false
                                 * @type {Boolean}
                                 */
                                required: {
                                    validator: A.Lang.isBoolean,
                                    value: false
                                }
                            };