code: def resolve_fragment(self, document, fragment):
          
  
          fragment = fragment.lstrip(u"/")
          parts = unquote(fragment).split(u"/") if fragment else []
  
          for part in parts:
              part = part.replace(u"~1", u"/").replace(u"~0", u"~")
  
              if isinstance(document, Sequence):
                  # Array indexes should be turned into integers
                  try:
                      part = int(part)
                  except ValueError:
                      pass
              try:
                  document = document[part]
              except (TypeError, LookupError):
                  raise RefResolutionError(
                      "Unresolvable JSON pointer: %r" % fragment
                  )
  
          return document
docs: Resolve a ``fragment`` within the referenced ``document``.
  
          :argument document: the referrant document
          :argument str fragment: a URI fragment to resolve within it