public function clear_cache( $mode = 'all' ) {
		$mode = $mode ? : 'all';
		$cleared = Command::clear_cache( $mode );
		if ( $cleared ) {
			\WP_CLI::success("Cleared {$mode} cached contents");
		} else {
			\WP_CLI::warning("Failed to clear {$mode} cached contents");
		}
	}