How to use the scrapbook.scraps.Scraps function in scrapbook

def _fetch_scraps(self):
        """Returns a dictionary of the data recorded in a notebook."""
        scraps = Scraps()

        for cell in self.cells:
            for output in cell.get("outputs", []):
                output_data_scraps = self._extract_output_data_scraps(output)
                output_displays = self._extract_output_displays(output)

                # Combine displays with data while trying to preserve ordering
                output_scraps = Scraps(
                    [
                        # Hydrate with output_displays
                        (
                            scrap.name,
                            Scrap(
                                scrap.name,
                                scrap.data,
                                scrap.encoder,
                                output_displays.get(scrap.name),
                            ),
                        )
                        for scrap in output_data_scraps.values()
                    ]
                )
                for name, display in output_displays.items():
                    if name not in output_scraps:

def _extract_output_data_scraps(self, output):
        output_scraps = Scraps()
        for sig, payload in output.get("data", {}).items():
            # Backwards compatibility for papermill
            scrap = self._extract_papermill_output_data(sig, payload)
            if scrap is None and sig.startswith(GLUE_PAYLOAD_PREFIX):
                scrap = encoder_registry.decode(payload_to_scrap(payload))
            if scrap:
                output_scraps[scrap.name] = scrap

        return output_scraps

def _fetch_scraps(self):
        """Returns a dictionary of the data recorded in a notebook."""
        scraps = Scraps()

        for cell in self.cells:
            for output in cell.get("outputs", []):
                output_data_scraps = self._extract_output_data_scraps(output)
                output_displays = self._extract_output_displays(output)

                # Combine displays with data while trying to preserve ordering
                output_scraps = Scraps(
                    [
                        # Hydrate with output_displays
                        (
                            scrap.name,
                            Scrap(
                                scrap.name,
                                scrap.data,
                                scrap.encoder,

def scraps(self):
        """dict: a dictionary of the merged notebook scraps."""
        return Scraps(merge_dicts(nb.scraps for nb in self.notebooks))