class DisplayExtenderPluginBase

abstract class DisplayExtenderPluginBase extends PluginBase {
    
    /**
     * Provide a form to edit options for this plugin.
     */
    public function defineOptionsAlter(&$options) {
    }
    
    /**
     * Provide a form to edit options for this plugin.
     */
    public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    }
    
    /**
     * Validate the options form.
     */
    public function validateOptionsForm(&$form, FormStateInterface $form_state) {
    }
    
    /**
     * Handle any special handling on the validate form.
     */
    public function submitOptionsForm(&$form, FormStateInterface $form_state) {
    }
    
    /**
     * Set up any variables on the view prior to execution.
     */
    public function preExecute() {
    }
    
    /**
     * Inject anything into the query that the display_extender handler needs.
     */
    public function query() {
    }
    
    /**
     * Provide the default summary for options in the views UI.
     *
     * This output is returned as an array.
     */
    public function optionsSummary(&$categories, &$options) {
    }
    
    /**
     * Gets a list of defaultable sections and the items they contain.
     */
    public function defaultableSections(&$sections, $section = NULL) {
    }

}