code: def help(command: str) -> str:
      assert command in ["install", "uninstall"]
      extra_description = (
          "Zsh is compatible with the Bash shell completion, see the [documentation]"
          "(https://hydra.cc/docs/1.2/tutorials/basic/running_your_app/tab_completion#zsh-instructions)"
          " for details.\n    "
      )
      command_text = f'eval "$({{}} -sc {command}=bash)"'
      if command == "install":
          return extra_description + command_text
      return command_text
  
file_path: hydra/hydra/_internal/core_plugins/zsh_completion.py
imports: import logging
  from typing import Optional
  from hydra.core.config_loader import ConfigLoader
  from hydra.plugins.completion_plugin import CompletionPlugin
label_desc: Use image node_id 6 for calling the ZshCompletion obj's underlying member method code with example usage: obj.help(command) and returns: command_text, unknown