class_docstr: Provides threadsafe utilities to modify warning behavior for MLflow autologging, including:
  
  - Global disablement of MLflow warnings across all threads
  - Global rerouting of MLflow warnings to an MLflow event logger (i.e. `logger.warning()`)
    across all threads
  - Disablement of non-MLflow warnings for the current thread
  - Rerouting of non-MLflow warnings to an MLflow event logger for the current thread
docstr: Patches or unpatches `warnings.showwarning` if necessary, as determined by:
      - Whether or not `warnings.showwarning` is already patched
      - Whether or not any custom warning state has been configured on the warnings
        controller (i.e. disablement or rerouting of certain warnings globally or for a
        particular thread)
  
  Note that reassigning `warnings.showwarning` is the standard / recommended approach for
  modifying warning message display behaviors. For reference, see
  https://docs.python.org/3/library/warnings.html#warnings.showwarning
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code: def _modify_patch_state_if_necessary(self):
      """
      Patches or unpatches `warnings.showwarning` if necessary, as determined by:
          - Whether or not `warnings.showwarning` is already patched
          - Whether or not any custom warning state has been configured on the warnings
            controller (i.e. disablement or rerouting of certain warnings globally or for a
            particular thread)
  
      Note that reassigning `warnings.showwarning` is the standard / recommended approach for
      modifying warning message display behaviors. For reference, see
      https://docs.python.org/3/library/warnings.html#warnings.showwarning
      """
      with self._state_lock:
          if (
              self._should_patch_showwarning()
              and not self._did_patch_showwarning
          ):
              self._original_showwarning = warnings.showwarning
              warnings.showwarning = self._patched_showwarning
              self._did_patch_showwarning = True
          elif (
              not self._should_patch_showwarning()
              and self._did_patch_showwarning
          ):
              warnings.showwarning = self._original_showwarning
              self._did_patch_showwarning = False
  
imports: import os
  import warnings
  from contextlib import contextmanager
  from pathlib import Path
  from threading import RLock
  from threading import get_ident
  import mlflow
  from mlflow.utils import logging_utils
label_desc: Use image node_id 4 for calling the _WarningsController obj's underlying member method code with example usage: obj._modify_patch_state_if_necessary() without return types