/**
                             * Provides a basic Overlay widget, with Standard Module content support. The Overlay widget
                             * provides Page XY positioning support, alignment and centering support along with basic
                             * stackable support (z-index and shimming).
                             *
                             * @module aui-overlay
                             * @submodule aui-overlay-base
                             */
                            
                            /**
                             * A basic Overlay Widget, which can be positioned based on Page XY co-ordinates and is stackable (z-index support).
                             * It also provides alignment and centering support and uses a standard module format for it's content, with header,
                             * body and footer section support.
                             *
                             * @class OverlayBase
                             * @constructor
                             * @extends Component
                             * @uses WidgetStdMod
                             * @uses WidgetPosition
                             * @uses WidgetStack
                             * @uses WidgetPositionAlign
                             * @uses WidgetPositionConstrain
                             * @param {Object} object The user configuration for the instance.
                             */
                            A.OverlayBase = A.Component.create({
                                NAME: 'overlay',
                                ATTRS: {
                                    hideClass: {
                                        value: false
                                    }
                                },
                                AUGMENTS: [A.WidgetPosition, A.WidgetStack, A.WidgetPositionAlign, A.WidgetPositionConstrain, A.WidgetStdMod]
                            });