code: public function getSource($sourceName, array $params = array(), array $sources = array())
      {
          $toReturn = new Chain($sourceName, $params, $sources);
          $toReturn->setDataParser($this->dataParser);
  
          return $toReturn;
      }
docs: Build source
  @param string $sourceName
  @param array  $params
  @param array  $sources
  @return \Yucca\Component\Source\Chain