def METHOD_NAME(self) -> Optional[int]:
    if self._feedcode is not None:
        return self._feedcode
    for page in self.memory_pages(min_addr=0x40000000000):
        result = self.find_in_page(page, b"\x00\xde\xc0\xed\xfe")
        if result:
            self._feedcode = result
            return result
    return None