/**
  * Display command begin note.
  *
  * @param InputInterface $input Console input.
  * @param OutputStyle $outputStyle Console style.
  * @return FetchCommand $this Fluent interface.
  */
 protected function displayCommandBegin(InputInterface $input, OutputStyle $outputStyle)
 {
     $outputStyle->title('Exchange rates:');
     $outputStyle->text(sprintf('Fetching from %s for date %s....', $input->getOption('source') ? sprintf('"%s"', implode('", "', $input->getOption('source'))) : 'all sources', $input->getOption('date')->format('Y-m-d')));
     return $this;
 }