def get_overlay(self):
        """Get the data appended to the file and not contained within the area described
        in the headers."""

        overlay_data_offset = self.get_overlay_data_start_offset()

        if overlay_data_offset is not None:
            return self.__data__[overlay_data_offset:]

        return None
Get the data appended to the file and not contained within the area described
        in the headers.
pefile.py