) {
		return $this->container->get( $this->get_helper_class( $helper ) );
	}

	/**
	 * Magic isset for ensuring helper exists.
	 *
	 * @param string $helper The helper to get.
	 *
	 * @return bool Whether the helper exists.
	 */
	public function __isset( $helper ) {
		return $this->container->has( $this->get_helper_class( $helper ) );
	}

	/**
	 * Prevents setting dynamic properties and unsetting declared properties
	 * from an inaccessible context.
	 *
	 * @param string $name  The property name.
	 * @param mixed  $value The property value.
	 *
	 * @return void
	 *
	 * @throws Forbidden_Property_Mutation_Exception Set is never meant to be called.
	 */
	public function __set( $name, $value ) { // @phpcs:ignore Generic.CodeAnalysis.UnusedFunctionParameter.FoundAfterLastUsed -- __set must have a name and value - PHPCS #3715.
		throw Forbidden_Property_Mutation_Exception::cannot_set_because_property_is_immutable( $name );
	}

	/**
	 * Prevents unsetting dynamic properties and unsetting declared properties
	 * from an inaccessible context.
	 *
	 * @param string $name The property name.
	 *
	 * @return void
	 *
	 * @throws Forbidden_Property_Mutation_Exception Unset is never meant to be called.
	 */
	public function __unset( $name ) {
		throw Forbidden_Property_Mutation_Exception::cannot_unset_because_property_is_immutable( $name );
	}

	/**
	 * Get the class name from a helper slug
	 *
	 * @param string $helper The name of the helper.
	 *
	 * @return string
	 */
	protected function get_helper_class( $helper ) {
		$helper = \implode( '_', \array_map( 'ucfirst', \explode( '_', $helper ) ) );

		return "Yoast\WP\SEO\Helpers\\{$helper}_Helper";
	}
}
<br />
<b>Fatal error</b>:  Uncaught Error: Class 'Yoast\WP\SEO\Surfaces\Helpers_Surface' not found in /home/khodroc1/public_html/wp-content/plugins/wordpress-seo/src/generated/container.php:5565
Stack trace:
#0 /home/khodroc1/public_html/wp-content/plugins/wordpress-seo/vendor_prefixed/symfony/dependency-injection/Container.php(271): Yoast\WP\SEO\Generated\Cached_Container-&gt;getHelpersSurfaceService()
#1 /home/khodroc1/public_html/wp-content/plugins/wordpress-seo/lib/abstract-main.php(80): YoastSEO_Vendor\Symfony\Component\DependencyInjection\Container-&gt;get('Yoast\\WP\\SEO\\Su...')
#2 /home/khodroc1/public_html/wp-content/plugins/wordpress-seo/admin/watchers/class-slug-change-watcher.php(20): Yoast\WP\Lib\Abstract_Main-&gt;__get('helpers')
#3 /home/khodroc1/public_html/wp-content/plugins/wordpress-seo/wp-seo-main.php(373): WPSEO_Slug_Change_Watcher-&gt;register_hooks()
#4 /home/khodroc1/public_html/wp-includes/class-wp-hook.php(324): wpseo_init('')
#5 /home/khodroc1/public_html/wp-includes/class-wp-hook.php(348): WP_Hook-&gt;apply_filters(NULL,  in <b>/home/khodroc1/public_html/wp-content/plugins/wordpress-seo/src/generated/container.php</b> on line <b>5565</b><br />