class_docstr: Concrete WorkerLauncher implementation for launching hyperopt workers in a round robin manner.
  
  See the `WorkerLauncher` documentation to get a list of the inherited methods and attributes.
docstr: Get the shell command for starting a worker instance.
  
  Returns:
       str: The launch command.
docstr_tok: ["Get","the","shell","command","for","starting","a","worker","instance",".","Returns",":","str",":","The","launch","command","."]
code: def _get_launch_command(
      cls, master_port: int, dbname: str, poll_interval: float = 0.1
  ) -> str:
      """Get the shell command for starting a worker instance.
  
      Returns:
           str: The launch command.
      """
      return (
          f"hyperopt-mongo-worker --mongo=localhost:{str(master_port)}/{dbname} "
          f"--poll-interval={str(poll_interval)}"
      )
  
imports: import os
  import time
  from typing import List, Optional, Union
  from lazycluster import Runtime, RuntimeGroup, RuntimeTask, _utils
  from lazycluster.cluster import MasterLauncher, MasterWorkerCluster, WorkerLauncher
  from lazycluster.cluster.exceptions import MasterStartError
  from lazycluster.exceptions import PortInUseError
  from lazycluster.utils import Environment
label_desc: Use image node_id 4 for calling the RoundRobinLauncher obj's underlying member method code with example usage: obj._get_launch_command(cls, master_port, dbname, poll_interval) and returns: str, str, str, dbname, str, str