request_bodies = self._request_bodies_strict
        if ref_name not in request_bodies:
            raise ValueError(f"No request body found for {ref_name}")
        return request_bodies[ref_name]
    def _get_root_referenced_request_body(
        self, ref: Reference
    ) -> Optional[RequestBody]:
        """Get the root request Body or err."""
        from openapi_pydantic import Reference
        request_body = self._get_referenced_request_body(ref)
        while isinstance(request_body, Reference):
            request_body = self._get_referenced_request_body(request_body)
        return request_body
    @staticmethod
    def _alert_unsupported_spec(obj: dict) -> None:
        """Alert if the spec is not supported."""
        warning_message = (
            " This may result in degraded performance."
            + " Convert your OpenAPI spec to 3.1.* spec"
            + " for better support."
        )
        swagger_version = obj.get("swagger")
        openapi_version = obj.get("openapi")
        if isinstance(openapi_version, str):
            if openapi_version != "3.1.0":
                logger.warning(
                    f"Attempting to load an OpenAPI {openapi_version}"
                    f" spec. {warning_message}"
                )
            else:
                pass
        elif isinstance(swagger_version, str):
            logger.warning(
                f"Attempting to load a Swagger {swagger_version}"
                f" spec. {warning_message}"
            )
        else:
            raise ValueError(
                "Attempting to load an unsupported spec:"
                f"\n\n{obj}\n{warning_message}"
            )
[docs]    @classmethod
    def parse_obj(cls, obj: dict) -> OpenAPISpec: