Show:
                            (function () {
                                'use strict';
                            
                                /**
                                 * The ButtonParagraphJustify class provides functionality for justfying a paragraph.
                                 *
                                 * @class ButtonParagraphJustify
                                 * @uses ButtonCommand
                                 * @uses ButtonCommandActive
                                 * @uses ButtonStateClasses
                                 */
                                var ButtonParagraphJustify = createReactClass({
                                    mixins: [AlloyEditor.ButtonStateClasses, AlloyEditor.ButtonCommand, AlloyEditor.ButtonCommandActive],
                            
                                    // Allows validating props being passed to the component.
                                    propTypes: {
                                        /**
                                         * The editor instance where the component is being used.
                                         *
                                         * @instance
                                         * @memberof ButtonParagraphJustify
                                         * @property {Object} editor
                                         */
                                        editor: PropTypes.object.isRequired,
                            
                                        /**
                                         * The label that should be used for accessibility purposes.
                                         *
                                         * @instance
                                         * @memberof ButtonParagraphJustify
                                         * @property {String} label
                                         */
                                        label: 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.
                                         *
                                         * @instance
                                         * @memberof ButtonParagraphJustify
                                         * @property {Number} tabIndex
                                         */
                                        tabIndex: PropTypes.number
                                    },
                            
                                    // Lifecycle. Provides static properties to the widget.
                                    statics: {
                                        /**
                                         * The name which will be used as an alias of the button in the configuration.
                                         *
                                         * @default paragraphJustify
                                         * @memberof ButtonParagraphJustify
                                         * @property {String} key
                                         * @static
                                         */
                                        key: 'paragraphJustify'
                                    },
                            
                                    /**
                                     * Lifecycle. Returns the default values of the properties used in the widget.
                                     *
                                     * @instance
                                     * @memberof ButtonParagraphJustify
                                     * @method getDefaultProps
                                     * @return {Object} The default properties.
                                     */
                                    getDefaultProps: function() {
                                        return {
                                            command: 'justifyblock'
                                        };
                                    },
                            
                                    /**
                                     * Lifecycle. Renders the UI of the button.
                                     *
                                     * @instance
                                     * @memberof ButtonParagraphJustify
                                     * @method render
                                     * @return {Object} The content which should be rendered.
                                     */
                                    render: function() {
                                        var cssClass = 'ae-button ' + this.getStateClasses();
                            
                                        return (
                                            <button aria-label={AlloyEditor.Strings.alignJustify} aria-pressed={cssClass.indexOf('pressed') !== -1} className={cssClass} data-type="button-paragraph-justify" onClick={this.execCommand} tabIndex={this.props.tabIndex} title={AlloyEditor.Strings.alignJustify}>
                                                <span className="ae-icon-align-justified"></span>
                                            </button>
                                        );
                                    }
                                });
                            
                                AlloyEditor.Buttons[ButtonParagraphJustify.key] = AlloyEditor.ButtonParagraphJustify = ButtonParagraphJustify;
                            }());