code: def wait_for_command_start(self, timeout):
      self._wait_cond.acquire()
      try:
          while self._command_thread is None:
              self._wait_cond.wait(timeout.remaining())
              timeout.check_time_out_for("command to run")
      finally:
          self._wait_cond.release()
  
imports: import threading
  import time
  from bluefog.run.horovodrun.common.util import network
  from bluefog.run.horovodrun.common.util import safe_shell_exec
label_desc: Use image node_id 5 for calling the BasicTaskService obj's underlying member method code with example usage: obj.wait_for_command_start(timeout) without return types