code: def _reset(self):
      super()._reset()
      self.aggregate_loss = 0.0
      self.total_masked_tokens = 0
  
imports: import json
  import math
  import operator
  import time
  import torch
  import torch.nn.functional
  from pytext.common.constants import Stage
  from pytext.config.module_config import PerplexityType
  from pytext.data import CommonMetadata
  from pytext.metrics.language_model_metrics import compute_language_model_metric, LanguageModelMetric
  from pytext.utils import cuda
  from .channel import ConsoleChannel, FileChannel
  from .metric_reporter import MetricReporter
label_desc: Use image node_id 6 for calling the MaskedLMMetricReporter obj's underlying member method code with example usage: obj._reset() without return types