code: def calculate_metric(self):
      # Load number of weights and current_model_parameter_size if information is available.
      num_weights = None
      current_model_parameter_size = None
      if "num_weights" in self.all_context:
          num_weights = self.all_context["num_weights"]
      if "current_model_parameter_size" in self.all_context:
          current_model_parameter_size = self.all_context[
              "current_model_parameter_size"
          ]
      all_metrics = compute_masked_metrics(
          self.create_frame_prediction_pairs(
              self.all_pred_trees, self.all_target_trees
          ),
          self.all_target_lens,
          self.all_target_length_preds,
          self.select_length_beam,
          overall_metrics=True,
          calculated_loss=self.calculate_loss(),
          all_predicted_frames=self.all_beam_preds,
          non_invalid_frame_pairs=self.create_frame_prediction_pairs(
              self.all_top_non_invalid, self.all_target_trees
          ),
          extracted_frame_pairs=self.create_frame_prediction_pairs(
              self.all_top_extract, self.all_target_trees
          ),
          print_length_metrics=self.print_length_metrics,
          num_weights=num_weights,
          current_model_parameter_size=current_model_parameter_size,
      )
      return all_metrics
  
imports: from collections import defaultdict
  from typing import Dict, List
  import numpy
  from pytext.common.constants import Stage
  from pytext.data.tensorizers import Tensorizer
  from pytext.metric_reporters.channel import ConsoleChannel
  from pytext.metric_reporters.compositional_metric_reporter import CompositionalMetricReporter
  from pytext.metric_reporters.seq2seq_compositional import CompositionalSeq2SeqFileChannel, Seq2SeqCompositionalMetricReporter
  from pytext.metrics.intent_slot_metrics import FramePredictionPair
  from pytext.metrics.mask_metrics import compute_masked_metrics, compute_nas_masked_metrics
  from .compositional_utils import extract_beam_subtrees, filter_invalid_beams
label_desc: Use image node_id 6 for calling the MaskedSeq2SeqCompositionalMetricReporter obj's underlying member method code with example usage: obj.calculate_metric() and returns: all_metrics