def METHOD_NAME(self, data: Any, t8n: Any) -> None:
    """
    Read the ommers. The ommers data might not have all the details
    needed to obtain the Header.
    """
    ommers = []
    if "ommers" in data:
        for ommer in data["ommers"]:
            ommers.append(
                Ommer(
                    ommer["delta"],
                    t8n.hex_to_address(ommer["address"]),
                )
            )
    self.ommers = ommers