class_docstr: LightGBM is inherited from lgb.Booster
code: def to(self, device):
      return self
  
file_path: RecBole/recbole/model/exlib_recommender/lightgbm.py
imports: import lightgbm
  from recbole.utils import ModelType, InputType
label_desc: Use image node_id 2 for calling the LightGBM obj's underlying member method code with example usage: obj.to(device) and returns: self