public function supported_version( $system ) {
		if ( $supported = wp_cache_get( $system, 'tribe_version_test' ) ) {
			return $supported;
		}

		switch ( strtolower( $system ) ) {
			case 'wordpress' :
				$supported = version_compare( get_bloginfo( 'version' ), $this->min_wordpress, '>=' );
				break;
			case 'php' :
				$supported = version_compare( phpversion(), $this->min_php, '>=' );
				break;
		}

		/**
		 * Filter whether the current version of PHP or WordPress is supported.
		 *
		 * @since 4.10
		 *
		 * @param boolean $supported Whether the current version of PHP or WordPress is supported.
		 * @param string  $system    Which system to test the version of such as 'php' or 'wordpress'.
		 */
		$supported = apply_filters( 'tribe_tickets_supported_system_version', $supported, $system );

		wp_cache_set( $system, $supported, 'tribe_version_test' );

		return $supported;
	}