def METHOD_NAME(self, soap_action: str) -> dict[str, str]:
    soap_version = self.service.soap_service.soap_version
    headers = {
        "Content-Type": SOAP_VERSION_CONTENT_TYPES[soap_version],
        "SOAPAction": (
            "http://www.egem.nl/StUF/sector/"
            f"{self.sector_alias}/0310/{soap_action}"
        ),
    }
    return headers