code: def logdet(mat):
      warnings.warn(
          "gpytorch.logdet is deprecated. Use torch.logdet instead.",
          DeprecationWarning,
      )
      return torch.logdet(mat)
  
file_path: gpytorch/gpytorch/functions/__init__.py
imports: from __future__ import annotations
  import warnings
  from typing import Any
  import linear_operator
  import torch
  from ._log_normal_cdf import LogNormalCDF
  from .matern_covariance import MaternCovariance
  from .rbf_covariance import RBFCovariance
label_desc: Use image node_id 2 for calling a global function with example usage: logdet(mat) and returns: torch