code: def close(self, unlink=True):
      if self._bpk_file is not None:
          self._model = None
          try:
              _log.debug("closing BPK file")
              try:
                  self._bpk_file.close()
              except BufferError:
                  _log.debug(
                      "could not close %s, collecting garbage and retrying",
                      self.path,
                  )
                  gc.collect()
                  self._bpk_file.close()
          except (BufferError, IOError) as e:
              _log.warn("error closing %s: %s", self.path, e)
          self._bpk_file = None
  
      if self.is_owner and unlink:
          assert self._model is None
          if unlink:
              _log.debug("deleting %s", self.path)
              try:
                  self.path.unlink()
              except IOError as e:
                  _log.warn("could not remove %s: %s", self.path, e)
          self.is_owner = False
  
file_path: lkpy/lenskit/sharing/binpickle.py
imports: import os
  import pathlib
  import tempfile
  import logging
  import gc
  import binpickle
  from .None import sharing_mode, PersistedModel
label_desc: Use image node_id 3 for calling the BPKPersisted obj's underlying member method code with example usage: obj.close(unlink) without return types