code: def get_range(self, start_dt, end_dt):
      return self._precalculated_series.loc[start_dt:end_dt]
  
file_path: catalyst/catalyst/sources/benchmark_source.py
imports: import pandas
  from catalyst.errors import InvalidBenchmarkAsset, BenchmarkAssetNotAvailableTooEarly, BenchmarkAssetNotAvailableTooLate
label_desc: Use image node_id 3 for calling the BenchmarkSource obj's underlying member method code with example usage: obj.get_range(start_dt, end_dt) and returns: self