code: def pip_install(cls):
      return f"`pip install {cls.pip_package or cls.name}`"
  
imports: from .integrations import is_optuna_available, is_ray_tune_available, is_sigopt_available, is_wandb_available, run_hp_search_optuna, run_hp_search_ray, run_hp_search_sigopt, run_hp_search_wandb
  from .trainer_utils import HPSearchBackend, default_hp_space_optuna, default_hp_space_ray, default_hp_space_sigopt, default_hp_space_wandb
  from .utils import logging
label_desc: Use image node_id 5 for calling the HyperParamSearchBackendBase obj's underlying member method code with example usage: obj.pip_install(cls) and returns: str, unknown, str