How do disable module shutdown functions on long-running Behat Drupal Extension processes

gistfile1.php

<?php

  /**
   * Register a shutdown function.
   *
   * We manually call shutdown functions, so register one to exit immediately.
   *
   * @BeforeSuite
   */
  public static function registerShutdownFunction() {
    register_shutdown_function('FeatureContext::shutdownFunction');
  }

  /**
   * The shutdown function to skip all others.
   */
  public static function shutdownFunction() {
    exit;
  }