private function write(string $levelstr, string $msg) {
		$timestamp = gmdate(\DateTime::ATOM);
			// @codeCoverageIgnoreStart
		try {
			// @codeCoverageIgnoreEnd
			$msg = $this->one_line($msg);
			$line = $this->format($timestamp, $levelstr, $msg);
			fwrite($this->handle, $line);
			// @codeCoverageIgnoreStart
		} catch(\Exception $e) {
		}
			// @codeCoverageIgnoreEnd
	}