code: def __create_neighbor_searcher(self, data_type):
          
          if data_type == 'points':
              return self.__neighbor_indexes_points
          elif data_type == 'distance_matrix':
              return self.__neighbor_indexes_distance_matrix
          else:
              raise TypeError("Unknown type of data is specified '%s'" % data_type)
docs: !
          @brief Returns neighbor searcher in line with data type.
  
          @param[in] data_type (string): Data type (points or distance matrix).