class_docstr: Usage of that class makes sense only if you have table data.
  Stores/loads `DataPreprocessor`'s encoders and imputers for pipelines to decrease optional preprocessing time.
  
  :param cache_dir: path to the place where cache files should be stored.
docstr: Tries to find preprocessor in DB table and load it for pipeline
  
  :param pipeline: pipeline to load preprocessor for
  :param fold_id: number of fold
code: def try_load_preprocessor(
      self, pipeline: "Pipeline", fold_id: Union[int, None]
  ):
      """
      Tries to find preprocessor in DB table and load it for pipeline
  
      :param pipeline: pipeline to load preprocessor for
      :param fold_id: number of fold
      """
      try:
          structural_id = _get_db_uid(pipeline, fold_id)
          processors = self._db.get_preprocessor(structural_id)
          if processors:
              pipeline.encoder, pipeline.imputer = processors
      except Exception as ex:
          self.log.warning(
              f"Preprocessor search error: {ex}", raise_if_test=True
          )
  
file_path: FEDOT/fedot/core/caching/preprocessing_cache.py
imports: from typing import TYPE_CHECKING, Optional, Union
  from fedot.core.caching.base_cache import BaseCache
  from fedot.core.caching.preprocessing_cache_db import PreprocessingCacheDB
label_desc: Use image node_id 2 for calling the PreprocessingCache obj's underlying member method code with example usage: obj.try_load_preprocessor(pipeline, fold_id) without return types