code: def default_metric_cmp_fn(
      current_metric: float, prev_best: float
  ) -> bool:
      """
      The default function to compare metric values between current metric and previous best metric.
  
      Args:
          current_metric: metric value of current round computation.
          prev_best: the best metric value of previous rounds to compare with.
  
      """
      return current_metric > prev_best
  
imports: from __future__ import annotations
  from abc import ABC, abstractmethod
  from collections.abc import Callable, Sequence
  from typing import TYPE_CHECKING, Any, cast
  import torch
  from monai.config import IgniteInfo
  from monai.transforms import apply_transform
  from monai.utils import ensure_tuple, min_version, optional_import
  from monai.utils.enums import CommonKeys, GanKeys
label_desc: Use image node_id 5 for calling a global function with example usage: default_metric_cmp_fn(current_metric, prev_best) and returns: unknown