code: public function getArrayFromJsonFile($strFilePath, $strFileName)
      {
          $jSonContent   = $this->getFileJsonContent($strFilePath, $strFileName);
          $arrayToReturn = json_decode($jSonContent, true);
          if (json_last_error() != JSON_ERROR_NONE) {
              $fName = $this->gluePathWithFileName($strFilePath, $strFileName);
              throw new \RuntimeException(sprintf('Unable to interpret JSON from %s file...', $fName));
          }
          return $arrayToReturn;
      }
docs: returns an array with non-standard holidays from a JSON file
  
  @param string $strFileName
  @return mixed