upei_roblib_search/targets/eds/Controller/RoblibSearchEdsController.php

<?php

namespace Drupal\roblib_search_eds\Controller;

use Drupal\Core\Controller\ControllerBase;

/**
 * Controller for d3 graphs.
 */
class RoblibSearchEdsController extends ControllerBase {

  /**
   * Display the markup.
   *
   * @return array
   *   A renderable array.
   */
  public function articleResults($query = NULL) {
     return [
      '#theme' => 'roblib_search_results',
      '#query' => $query,
    ];
  }
  
  /**
   * Display the markup.
   *
   * @return array
   *   A renderable array.
   */
  public function bookResults($query = NULL) {
     return [
      '#theme' => 'roblib_search_results',
      '#query' => $query,
    ];
  }

}