class_docstr: Package-aware unpickler.
  
  This behaves the same as a normal unpickler, except it uses `importer` to
  find any global names that it encounters while unpickling.
code: def find_class(self, module, name):
      # Subclasses may override this.
      if self.proto < 3 and self.fix_imports:  # type: ignore[attr-defined]
          if (module, name) in _compat_pickle.NAME_MAPPING:
              module, name = _compat_pickle.NAME_MAPPING[(module, name)]
          elif module in _compat_pickle.IMPORT_MAPPING:
              module = _compat_pickle.IMPORT_MAPPING[module]
      mod = self._importer.import_module(module)
      return getattr(mod, name)
  
imports: import _compat_pickle
  import pickle
  from .importer import Importer
label_desc: Use image node_id 2 for calling the PackageUnpickler obj's underlying member method code with example usage: obj.find_class(module, name) and returns: getattr