code: def get_trading_days(self, start, end):
      nyse = tc.get_calendar("NYSE")
      df = nyse.sessions_in_range(
          pd.Timestamp(start).tz_localize(None),
          pd.Timestamp(end).tz_localize(None),
      )
      trading_days = []
      for day in df:
          trading_days.append(str(day)[:10])
  
      return trading_days
  
imports: from __future__ import annotations
  from concurrent.futures import ProcessPoolExecutor
  from concurrent.futures import ThreadPoolExecutor
  import alpaca_trade_api
  import exchange_calendars
  import numpy
  import pandas
  import pytz
  from stockstats import StockDataFrame
label_desc: Use image node_id 12 for calling the AlpacaProcessor obj's underlying member method code with example usage: obj.get_trading_days(start, end) and returns: trading_days