code: def __init__(
      self, stages, file_path, tensorizers, accept_flat_intents_slots
  ):
      super().__init__(stages, file_path, tensorizers)
      self.accept_flat_intents_slots = accept_flat_intents_slots
  
imports: from typing import Dict, List, Optional
  from pytext.common.constants import BatchContext, DatasetFieldName, RawExampleFieldName, Stage
  from pytext.data.data_structures.annotation import Annotation, INVALID_TREE_STR
  from pytext.data.tensorizers import Tensorizer
  from pytext.metric_reporters.channel import Channel, ConsoleChannel
  from pytext.metric_reporters.compositional_metric_reporter import CompositionalMetricReporter
  from pytext.metric_reporters.metric_reporter import MetricReporter
  from pytext.metric_reporters.seq2seq_metric_reporter import Seq2SeqFileChannel, Seq2SeqMetricReporter
  from pytext.metrics.intent_slot_metrics import compute_all_metrics, FramePredictionPair
label_desc: Use image node_id 1 to create a new CompositionalSeq2SeqFileChannel object from inherited base classes: Seq2SeqFileChannel with example: obj = CompositionalSeq2SeqFileChannel(stages, file_path, tensorizers, accept_flat_intents_slots)