code: def finish_starting_nodes(self):
      with self.lock:
          for node in self.mock_nodes.values():
              if node.state == "pending":
                  node.state = "running"
  
imports: import re
  import threading
  from subprocess import CalledProcessError
  from typing import Callable, Dict, List, Optional
  from ray.autoscaler.node_provider import NodeProvider
label_desc: Use image node_id 12 for calling the MockProvider obj's underlying member method code with example usage: obj.finish_starting_nodes() without return types