private function generateYaml(array $data)
    {
        $fileContent = array();
        $header = array();
        foreach ($data as $path => $scopes) {
            $paths = explode('/', $path);
            if (!isset($header[$paths[0]])) {
                $header[$paths[0]] = true;
                $length = strlen($paths[0]) + 2;
                $fileContent[] = PHP_EOL . $this->getIndentation($length, '#') . PHP_EOL . '# ' . $paths[0] . PHP_EOL . $this->getIndentation($length, '#');
            }

            $fileContent[] = $path . ':';
            foreach ($scopes as $scope => $scopeValues) {
                $fileContent[] = $this->getIndentation(2) . $scope . ':';
                foreach ($scopeValues as $scopeId => $value) {
                    $fileContent[] = $this->getIndentation(4) . $scopeId . ': ' . $this->prepareValue($value);
                }
            }
        }

        return implode(PHP_EOL, $fileContent);
    }