code: def check_and_correct(self, cfg):
      loss_cfg = cfg.dic.get(self.loss_name, None)
      if loss_cfg is None:
          return
  
      assert (
          "types" in loss_cfg and "coef" in loss_cfg
      ), 'Loss config should contain keys of "types" and "coef"'
      len_types = len(loss_cfg["types"])
      len_coef = len(loss_cfg["coef"])
      if len_types != len_coef:
          if len_types == 1:
              loss_cfg["types"] = loss_cfg["types"] * len_coef
          else:
              raise ValueError(
                  "For loss config, the length of types should be 1 "
                  "or be equal to coef , but they are {} and {}.".format(
                      len_types, len_coef
                  )
              )
  
imports: import copy
  from paddleseg.utils import logger
  from paddleseg.utils import utils
label_desc: Use image node_id 2 for calling the DefaultLossRule obj's underlying member method code with example usage: obj.check_and_correct(cfg) without return types