class_docstr: Class for connecting models and data operations with json files with
  its descriptions and metadata
code: def is_initialized(self):
      return (
          OperationTypesRepository.__repository_dict__[
              self.operation_type
          ]["initialized_repo"]
          is None
      )
  
imports: import json
  import os
  from collections import defaultdict
  from dataclasses import dataclass
  from typing import Dict, List, Optional, TYPE_CHECKING, Union
  import numpy
  from golem.core.log import default_log
  from golem.utilities.data_structures import ensure_wrapped_in_sequence
  from fedot.core.constants import AUTO_PRESET_NAME, BEST_QUALITY_PRESET_NAME
  from fedot.core.repository.dataset_types import DataTypesEnum
  from fedot.core.repository.json_evaluation import import_enums_from_str, import_strategy_from_str, read_field
  from fedot.core.repository.tasks import Task, TaskTypesEnum
label_desc: Use image node_id 9 for calling the OperationTypesRepository obj's underlying member method code with example usage: obj.is_initialized() and returns: unknown