interface CKEditorPluginButtonsInterface

interface CKEditorPluginButtonsInterface extends CKEditorPluginInterface {
    
    /**
     * Returns the buttons that this plugin provides, along with metadata.
     *
     * The metadata is used by the CKEditor module to generate a visual CKEditor
     * toolbar builder UI.
     *
     * @return array
     *   An array of buttons that are provided by this plugin. This will
     *   only be used in the administrative section for assembling the toolbar.
     *   Each button should be keyed by its CKEditor button name (you can look up
     *   the button name up in the plugin.js file), and should contain an array of
     *   button properties, including:
     *   - label: A human-readable, translated button name.
     *   - image: An image for the button to be used in the toolbar.
     *   - image_rtl: If the image needs to have a right-to-left version, specify
     *     an alternative file that will be used in RTL editors.
     *   - image_alternative: If this button does not render as an image, specify
     *     an HTML string representing the contents of this button.
     *   - image_alternative_rtl: Similar to image_alternative, but a
     *     right-to-left version.
     *   - attributes: An array of HTML attributes which should be added to this
     *     button when rendering the button in the administrative section for
     *     assembling the toolbar.
     *   - multiple: Boolean value indicating if this button may be added multiple
     *     times to the toolbar. This typically is only applicable for dividers
     *     and group indicators.
     */
    public function getButtons();

}