interface ContextualLinkInterface

interface ContextualLinkInterface {
    
    /**
     * Returns the localized title to be shown for this contextual link.
     *
     * Subclasses may add optional arguments like NodeInterface $node = NULL that
     * will be supplied by the ControllerResolver.
     *
     * @return string
     *   The title to be shown for this action.
     *
     * @see \Drupal\Core\Menu\ContextualLinksManager::getTitle()
     */
    public function getTitle();
    
    /**
     * Returns the route name of the contextual link.
     *
     * @return string
     *   The name of the route this contextual link links to.
     */
    public function getRouteName();
    
    /**
     * Returns the group this contextual link should be rendered in.
     *
     * A contextual link group is a set of contextual links that are displayed
     * together on a certain page. For example, the 'block' group displays all
     * links related to the block, such as the block instance edit link as well as
     * the views edit link, if it is a view block.
     *
     * @return string
     *   The contextual links group name.
     */
    public function getGroup();
    
    /**
     * Returns the link options passed to the link generator.
     *
     * @return array
     *   An associative array of options.
     */
    public function getOptions();
    
    /**
     * Returns the weight of the contextual link.
     *
     * The contextual links in one group are sorted by weight for display.
     *
     * @return int
     *   The weight as positive/negative integer.
     */
    public function getWeight();

}