/**
                             * A base class for DiagramNodeStart.
                             *
                             * @class A.DiagramNodeStart
                             * @extends A.DiagramNodeState
                             * @param {Object} config Object literal specifying widget configuration
                             *     properties.
                             * @constructor
                             */
                            var DiagramNodeStart = A.Component.create({
                            
                                /**
                                 * Static property provides a string to identify the class.
                                 *
                                 * @property NAME
                                 * @type String
                                 * @static
                                 */
                                NAME: 'diagram-node',
                            
                                /**
                                 * Static property used to define the default attribute
                                 * configuration for the `A.DiagramNodeStart`.
                                 *
                                 * @property ATTRS
                                 * @type Object
                                 * @static
                                 */
                                ATTRS: {
                            
                                    /**
                                     * The type of the node.
                                     *
                                     * @attribute type
                                     * @default 'start'
                                     * @type String
                                     */
                                    type: {
                                        value: 'start'
                                    }
                                },
                            
                                /**
                                 * Static property used to define which component it extends.
                                 *
                                 * @property EXTENDS
                                 * @type String
                                 * @static
                                 */
                                EXTENDS: A.DiagramNodeState
                            });
                            
                            A.DiagramNodeStart = DiagramNodeStart;