code: def zero_loss(self):
      return {
          "losses": 0,
          "indices": None,
          "reduction_type": "already_reduced",
      }
  
file_path: pytorch-metric-learning/src/pytorch_metric_learning/losses/base_metric_loss_function.py
imports: import inspect
  from ..utils import common_functions
  from ..utils.module_with_records_and_reducer import ModuleWithRecordsReducerAndDistance
  from .mixins import EmbeddingRegularizerMixin
label_desc: Use image node_id 3 for calling the BaseMetricLossFunction obj's underlying member method code with example usage: obj.zero_loss() and returns: dict