responsive_menu-4.4.1/tests/modules/responsive_menu_test/responsive_menu_test.module

<?php

/**
 * @file
 */

/**
 * Implements hook_responsive_menu_off_canvas_output().
 */
function responsive_menu_test_responsive_menu_off_canvas_output_alter(&$output) {
  $theme = \Drupal::service('theme.manager')->getActiveTheme()->getName();
  if ($theme === 'starterkit_theme') {
    $output = FALSE;
  }
}