class_docstr: Simple static dictionary-based assumptions for classification task. 
class_docstr_tok: ["Simple","static","dictionary-based","assumptions","for","classification","task","."]
code: def fallback_builder(
      self, operations_filter: OperationsFilter
  ) -> PipelineBuilder:
      random_choice_node = operations_filter.sample()
      return PipelineBuilder().add_node(random_choice_node)
  
imports: from abc import abstractmethod
  from typing import List
  from fedot.api.api_utils.assumptions.operations_filter import OperationsFilter
  from fedot.core.pipelines.pipeline_builder import PipelineBuilder
  from fedot.core.repository.operation_types_repository import OperationTypesRepository
  from fedot.core.repository.tasks import Task, TaskTypesEnum
  from fedot.utilities.custom_errors import AbstractMethodNotImplementError
label_desc: Use image node_id 4 for calling the ClassificationAssumptions obj's underlying member method code with example usage: obj.fallback_builder(operations_filter) and returns: PipelineBuilder