code: def _get_numpy_metadata_tuple(self, arr: "np.ndarray"):
      klass = self._get_coerced_mmap_class(arr)
      return (klass, ("HASHED", arr.dtype, arr.shape, arr.strides))
  
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 4 for calling the FastNumpyHasher obj's underlying member method code with example usage: obj._get_numpy_metadata_tuple(arr) and returns: klass,  str,  arr,  arr,  arr