code: def get_num_unfinished_seq_groups(self) -> int:
      return len(self.waiting) + len(self.running)
  
imports: import enum
  import time
  from typing import Dict, Iterable, List, Optional, Tuple, Union
  from bigdl.llm.vllm.config import SchedulerConfig
  from bigdl.llm.vllm.core.policy import PolicyFactory
  from bigdl.llm.vllm.logger import init_logger
  from bigdl.llm.vllm.sequence import SequenceData, SequenceStatus
  from bigdl.llm.vllm.sequence import Sequence, SequenceGroup, SequenceGroupMetadata
  from bigdl.llm.utils.common import invalidInputError
label_desc: Use image node_id 5 for calling the FixedWindowScheduler obj's underlying member method code with example usage: obj.get_num_unfinished_seq_groups() and returns: unknown