code: def step_init(
      self,
      flow,
      graph,
      step_name,
      decorators,
      environment,
      flow_datastore,
      logger,
  ):
      self.environment = environment
  
file_path: metaflow/metaflow/plugins/parallel_decorator.py
imports: from metaflow.decorators import StepDecorator
  from metaflow.unbounded_foreach import UBF_CONTROL
  from metaflow.exception import MetaflowException
  import os
  import sys
label_desc: Use image node_id 3 for calling the ParallelDecorator obj's underlying member method code with example usage: obj.step_init(flow, graph, step_name, decorators, environment, flow_datastore, logger) without return types