docs: def _cast_dict(self, data_dict):
          """Internal method that makes sure any dictionary elements
          are properly cast into the correct types, instead of
          just treating everything like a string from the csv file.
  
          Args:
              data_dict: dictionary containing bro log data.
  
          Returns:
              Cleaned Data dict.
          """
          for key, value in data_dict.iteritems():
              data_dict[key] = self._cast_value(value)
  
          # Fixme: resp_body_data can be very large so removing it for now
          if 'resp_body_data' in data_dict:
              del data_dict['resp_body_data']
  
          return data_dict