code: def get_books_by_comment(self, comment_id):
          
          # Implemented from template for
          # osid.resource.ResourceBinSession.get_bins_by_resource
          mgr = self._get_provider_manager('COMMENTING', local=True)
          lookup_session = mgr.get_book_lookup_session(proxy=self._proxy)
          return lookup_session.get_books_by_ids(
              self.get_book_ids_by_comment(comment_id))
docs: Gets the list of ``Book`` objects mapped to a ``Comment``.
  
          arg:    comment_id (osid.id.Id): ``Id`` of a ``Comment``
          return: (osid.commenting.BookList) - list of books
          raise:  NotFound - ``comment_id`` is not found
          raise:  NullArgument - ``comment_id`` is ``null``
          raise:  OperationFailed - unable to complete request
          raise:  PermissionDenied - authorization failure
          *compliance: mandatory -- This method must be implemented.*