code: def frequency_bin(
      lower: Union[int, float], upper: Union[int, float]
  ) -> FrequencyBin:
      return FrequencyBin(lower, upper, count=0, sum=0, max=0)
  
file_path: pipelinedp/tests/dataset_histograms/histograms_test.py
imports: from typing import Union, List
  from absl.testing import absltest
  from absl.testing import parameterized
  from pipeline_dp.dataset_histograms import histograms
  from pipeline_dp.dataset_histograms.histograms import HistogramType, FrequencyBin
label_desc: Use image node_id 1 for calling a global function with example usage: frequency_bin(lower, upper) and returns: FrequencyBin