ks if the current page is an AMP page.
	 *
	 * @since 4.2.4
	 *
	 * @return bool Whether the current page is an AMP page.
	 */
	private function isAmpPageHelper() {
		// First check for the existence of any AMP plugin functions. Bail early if none are found, and prevent false positives.
		if (
			! function_exists( 'amp_is_request' ) &&
			! function_exists( 'is_amp_endpoint' ) &&
			! function_exists( 'ampforwp_is_amp_endpoint' ) &&
			! function_exists( 'is_amp_wp' )
		) {
			// If none of the AMP plugin functions are found, return false and allow compatibility with custom implementations.
			return apply_filters( 'aioseo_is_amp_page', false );
		}

		// AMP plugin requires the `wp` action to be called to function properly, otherwise, it will throw warnings.
		// https://github.com/awesomemotive/aioseo/issues/6056
		if ( did_action( 'wp' ) ) {
			// Check for the "AMP" plugin.
			if ( function_exists( 'amp_is_request' ) ) {
				return (bool) amp_is_request();
			}

			// Check for the "AMP" plugin (`is_amp_endpoint()` is deprecated).
			if ( function_exists( 'is_amp_endpoint' ) ) {
				return (bool) is_amp_endpoint();
			}

			// Check for the "AMP for WP – Accelerated Mobile Pages" plugin.
			if ( function_exists( 'ampforwp_is_amp_endpoint' ) ) {
				return (bool) ampforwp_is_amp_endpoint();
			}

			// Check for the "AMP WP" plugin.
			if ( function_exists( 'is_amp_wp' ) ) {
				return (bool) is_amp_wp();
			}
		}

		return false;
	}

	/**
	 * If we're in a LearnPress lesson page, return the lesson ID.
	 *
	 * @since 4.3.1
	 *
	 * @return int|false
	 */
	public function getLearnPressLesson() {
		global $lp_course_item;
		if ( $lp_course_item && method_exists( $lp_course_item, 'get_id' ) ) {
			return $lp_course_item->get_id();
		}

		return false;
	}

	/**
	 * Set a flag to indicate Divi whether it is processing internal content or not.
	 *
	 * @since 4.4.3
	 *
	 * @param  null|bool $flag The flag value.
	 * @return null|bool       The previous flag value to reset it later.
	 */
	public function setDiviInternalRendering( $flag ) {
		if ( ! defined( 'ET_BUILDER_VERSION' ) ) {
			return null;
		}

		global $et_pb_rendering_column_content;

		$originalValue                  = $et_pb_rendering_column_content;
		$et_pb_rendering_column_content = $flag;

		return $originalValue;
	}

	/**
	 * Checks whether the current request is being done by a crawler from Yandex.
	 *
	 * @since 4.4.0
	 *
	 * @return bool Whether the current request is being done by a crawler from Yandex.
	 */
	public function isYandexUserAgent() {
		if ( ! isset( $_SERVER['HTTP_USER_AGENT'] ) ) {
			return false;
		}

		return preg_match( '#.*Yandex.*#', $_SERVER['HTTP_USER_AGENT'] );
	}
}