class_docstr: Abstracts task-specific pipeline assumptions. 
class_docstr_tok: ["Abstracts","task-specific","pipeline","assumptions","."]
docstr: Suitable ensemble operation used for MultiModalData case. 
docstr_tok: ["Suitable","ensemble","operation","used","for","MultiModalData","case","."]
code: def ensemble_operation(self) -> str:
      """Suitable ensemble operation used for MultiModalData case."""
      raise AbstractMethodNotImplementError
  
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 3 for calling the TaskAssumptions obj's underlying member method code with example usage: obj.ensemble_operation() without return types