code: def aggregate_context(self, context):
      for key, val in context.items():
          if key not in self.all_context:
              self.all_context[key] = []
          self.all_context[key].extend(val)
  
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 11 for calling the LanguageModelMetricReporter obj's underlying member method code with example usage: obj.aggregate_context(context) without return types