protected function getCompressionHelp()
{
$messages = array();
$messages[] = '';
$messages[] = '<comment>Compression option</comment>';
$messages[] = ' Supported compression: gzip';
$messages[] = ' The gzip cli tool has to be installed.';
$messages[] = ' Additionally, for data-to-csv option tar cli tool has to be installed too.';
return implode(PHP_EOL, $messages);
}