code: def do_get(self, context, ticket):
      logger.info(f"do_get: ticket={ticket}")
      key = ast.literal_eval(ticket.ticket.decode())
      if key not in self.flights:
          logger.warn(f"do_get: key={key} not found")
          return None
      logger.info(f"do_get: returning key={key}")
      flight = self.flights.pop(key)
      return pyarrow.flight.RecordBatchStream(flight)
  
imports: import ast
  import logging
  import threading
  import time
  import uuid
  import pyarrow
  import pyarrow.flight
label_desc: Use image node_id 7 for calling the FlightServer obj's underlying member method code with example usage: obj.do_get(context, ticket) and returns: pyarrow, None