code: def cache(
      self, func=None, ignore=None, verbose=None, mmap_mode=False
  ):
      ret = super().cache(func, ignore, verbose, mmap_mode)
      if isinstance(ret, MemorizedFunc):
          ret.__class__ = FastMemorizedFunc
          ret.min_time_to_cache = self.min_time_to_cache
          ret._cached_output_identifiers = None
          self._cache_counter += 1
          if self._cache_counter >= self.caches_between_reduce:
              self.reduce_size()
      return ret
  
imports: import hashlib
  import pickle
  import struct
  import sys
  import tempfile
  import time
  import traceback
  from pathlib import Path
  from typing import TYPE_CHECKING, Union
  from joblib.hashing import Hasher, Pickler
  from joblib.memory import MemorizedFunc, MemorizedResult, Memory, NotMemorizedResult, _format_load_msg, filter_args, format_call, format_signature, format_time, get_func_name
  from xxhash import xxh128
label_desc: Use image node_id 3 for calling the FastMemory obj's underlying member method code with example usage: obj.cache(func, ignore, verbose, mmap_mode) and returns: ret