code: def _buf(self) -> memoryview:
      return memoryview(self.ud.mem)[
          self.offset : self.offset + self.size * self.dtype.itemsize
      ]
  
imports: import os, mmap, _posixshmem, io
  from typing import Callable, Dict, Tuple
  from tinygrad.dtype import DType, dtypes
  from tinygrad.helpers import prod, OSX
  from tinygrad.device import Interpreted, Allocator
  from tinygrad.ops import Op, MovementOps, UnaryOps
  from tinygrad.shape.view import strides_for_shape
label_desc: Use image node_id 5 for calling the DiskBuffer obj's underlying member method code with example usage: obj._buf() and returns: memoryview