protected function _renderCoverage($metrics)
    {
        $stats = $metrics->data();
        foreach ($stats['files'] as $file) {
            $this->write("File: {$file}" . "\n\n");

            $lines = file($file);

            $coverage = $this->_collector->export($file);

            if (isset($stats['line'])) {
                $start = $stats['line']['start'];
                $stop = $stats['line']['stop'];
            } else {
                $start = 0;
                $stop = count($lines) - 1;
            }

            for ($i = $start; $i <= $stop; $i++) {
                $value = isset($coverage[$i]) ? $coverage[$i] : null;
                $line = str_pad($i + 1, 6, ' ', STR_PAD_LEFT);
                $line .= ':' . str_pad($value, 6, ' ');
                $line .= $lines[$i];
                if ($value) {
                    $this->write($line, 'n;green');
                } elseif ($value === 0) {
                    $this->write($line, 'n;red');
                } else {
                    $this->write($line);
                }
            }
            $this->write("\n\n");
        }
    }