docstr: Returns the index of the first predicted within the output of self.model.
docstr_tok: ["Returns","the","index","of","the","first","predicted","within","the","output","of","self.model","."]
code: def first_prediction_index(self) -> int:
      """
      Returns the index of the first predicted within the output of self.model.
      """
      return 0
  
imports: from abc import ABC, abstractmethod
  from functools import wraps
  from typing import Any, Dict, Optional, Sequence, Tuple, Union
  import pytorch_lightning
  import torch
  import torch.nn
  import torchmetrics
  from joblib import Parallel, delayed
  from darts.logging import get_logger, raise_if, raise_log
  from darts.models.components.layer_norm_variants import RINorm
  from darts.timeseries import TimeSeries
  from darts.utils.likelihood_models import Likelihood
  from darts.utils.timeseries_generation import _build_forecast_series
  from darts.utils.torch import MonteCarloDropout
label_desc: Use image node_id 2 for calling the PLForecastingModule obj's underlying member method code with example usage: obj.first_prediction_index() and returns: int