code: def create_frame_prediction_pairs(self):
      return [
          FramePredictionPair(
              CompositionalMetricReporter.tree_to_metric_node(
                  pred_tree
              ),
              CompositionalMetricReporter.tree_to_metric_node(
                  target_tree
              ),
          )
          for pred_tree, target_tree in self.pred_target_trees
      ]
  
imports: from typing import Dict, List, Set, Union
  from pytext.common.constants import BatchContext, DatasetFieldName, Stage
  from pytext.data import CommonMetadata
  from pytext.data.data_structures.annotation import Intent, REDUCE, SHIFT, Slot, Token, Tree, TreeBuilder
  from pytext.data.tensorizers import Tensorizer
  from pytext.data.tokenizers import Tokenizer
  from pytext.metrics.intent_slot_metrics import compute_all_metrics, FramePredictionPair, Node, Span
  from .channel import Channel, ConsoleChannel, FileChannel
  from .metric_reporter import MetricReporter
label_desc: Use image node_id 8 for calling the CompositionalMetricReporter obj's underlying member method code with example usage: obj.create_frame_prediction_pairs() and returns: unknown