interface CategorizingPluginManagerInterface

interface CategorizingPluginManagerInterface extends PluginManagerInterface {
    
    /**
     * Gets the names of all categories.
     *
     * @return string[]
     *   An array of translated categories, sorted alphabetically.
     */
    public function getCategories();
    
    /**
     * Gets sorted plugin definitions.
     *
     * @param array[]|null $definitions
     *   (optional) The plugin definitions to sort. If omitted, all plugin
     *   definitions are used.
     *
     * @return array[]
     *   An array of plugin definitions, sorted by category and label.
     */
    public function getSortedDefinitions(array $definitions = NULL);
    
    /**
     * Gets sorted plugin definitions grouped by category.
     *
     * In addition to grouping, both categories and its entries are sorted,
     * whereas plugin definitions are sorted by label.
     *
     * @param array[]|null $definitions
     *   (optional) The plugin definitions to group. If omitted, all plugin
     *   definitions are used.
     *
     * @return array[]
     *   Keys are category names, and values are arrays of which the keys are
     *   plugin IDs and the values are plugin definitions.
     */
    public function getGroupedDefinitions(array $definitions = NULL);

}