Show:
                            (function () {
                                'use strict';
                            
                                /**
                                 * The ButtonTableHeading class provides functionality to work with table heading.
                                 *
                                 * @class ButtonTableHeading
                                 */
                                var ButtonTableHeading = React.createClass({
                                    // Allows validating props being passed to the component.
                                    propTypes: {
                                        /**
                                         * List of the commands the button is able to handle.
                                         *
                                         * @property {Array} commands
                                         */
                                        commands: React.PropTypes.arrayOf(React.PropTypes.object),
                            
                                        /**
                                         * The editor instance where the component is being used.
                                         *
                                         * @property {Object} editor
                                         */
                                        editor: React.PropTypes.object.isRequired,
                            
                                        /**
                                         * Indicates whether the styles list is expanded or not.
                                         *
                                         * @property {Boolean} expanded
                                         */
                                        expanded: React.PropTypes.bool,
                            
                                        /**
                                         * The label that should be used for accessibility purposes.
                                         *
                                         * @property {String} label
                                         */
                                        label: React.PropTypes.string,
                            
                                        /**
                                         * The tabIndex of the button in its toolbar current state. A value other than -1
                                         * means that the button has focus and is the active element.
                                         *
                                         * @property {Number} tabIndex
                                         */
                                        tabIndex: React.PropTypes.number,
                            
                                        /**
                                         * Callback provided by the button host to notify when the styles list has been expanded.
                                         *
                                         * @property {Function} toggleDropdown
                                         */
                                        toggleDropdown: React.PropTypes.func
                                    },
                            
                                    // Lifecycle. Provides static properties to the widget.
                                    statics: {
                                        /**
                                         * The name which will be used as an alias of the button in the configuration.
                                         *
                                         * @static
                                         * @property {String} key
                                         * @default tableRow
                                         */
                                        key: 'tableHeading'
                                    },
                            
                                    /**
                                     * Lifecycle. Renders the UI of the button.
                                     *
                                     * @method render
                                     * @return {Object} The content which should be rendered.
                                     */
                                    render: function() {
                                        var buttonCommandsList;
                                        var buttonCommandsListId;
                            
                                        if (this.props.expanded) {
                                            buttonCommandsListId = ButtonTableHeading.key + 'List';
                                            buttonCommandsList = <AlloyEditor.ButtonCommandsList commands={this._getCommands()} editor={this.props.editor} listId={buttonCommandsListId} onDismiss={this.props.toggleDropdown} />
                                        }
                            
                                        var activeHeading = new CKEDITOR.Table(this.props.editor.get('nativeEditor')).getHeading();
                                        var activeHeadingIntro = AlloyEditor.Strings.headers + ':';
                                        var activeHeadingLabel = AlloyEditor.Strings['headers' + activeHeading];
                            
                                        return (
                                            <div className="ae-container-dropdown-xl ae-has-dropdown">
                                                <button aria-expanded={this.props.expanded} aria-label="" className="ae-toolbar-element" onClick={this.props.toggleDropdown} role="combobox" tabIndex={this.props.tabIndex} title="">
                                                    <div className="ae-container">
                                                        <span className="ae-container-dropdown-selected-item">{activeHeadingIntro} <strong>{activeHeadingLabel}</strong></span>
                                                        <span className="ae-icon-arrow"></span>
                                                    </div>
                                                </button>
                                                {buttonCommandsList}
                                            </div>
                                        );
                                    },
                            
                                    /**
                                     * Returns a list of commands. If a list of commands was passed
                                     * as property `commands`, it will take a precedence over the default ones.
                                     *
                                     * @method _getCommands
                                     * @return {Array} The list of available commands.
                                     */
                                    _getCommands: function () {
                                        return this.props.commands || [
                                            {
                                                command: 'tableHeadingNone',
                                                label: AlloyEditor.Strings.headersNone
                                            },
                                            {
                                                command: 'tableHeadingRow',
                                                label: AlloyEditor.Strings.headersRow
                                            },
                                            {
                                                command: 'tableHeadingColumn',
                                                label: AlloyEditor.Strings.headersColumn
                                            },
                                            {
                                                command: 'tableHeadingBoth',
                                                label: AlloyEditor.Strings.headersBoth
                                            }
                                        ];
                                    }
                                });
                            
                                AlloyEditor.Buttons[ButtonTableHeading.key] = AlloyEditor.ButtonTableHeading = ButtonTableHeading;
                            }());