private function getValue(InputInterface $input, $varName)
{
$envVarName = sprintf('INSIGHT_%s', str_replace(' ', '_', strtoupper($varName)));
if ($value = getenv($envVarName)) {
return $value;
}
$cliVarName = sprintf('--%s', str_replace(' ', '-', strtolower($varName)));
return $input->getParameterOption($cliVarName);
}