async fn delete_namespace(
        &self,
    ) -> Result<DeleteNamespaceResponse, RusotoError<DeleteNamespaceError>> {
        let mut request = self.new_signed_request("POST", "/");
        request.add_header(
            "x-amz-target",
            "IotThingsGraphFrontEndService.DeleteNamespace",
        );
        request.set_payload(Some(bytes::Bytes::from_static(b"{}")));

        let response = self
            .sign_and_dispatch(request, DeleteNamespaceError::from_response)
            .await?;
        let mut response = response;
        let response = response.buffer().await.map_err(RusotoError::HttpDispatch)?;
        proto::json::ResponsePayload::new(&response).deserialize::<DeleteNamespaceResponse, _>()
    }
<p>Deletes the specified namespace. This action deletes all of the entities in the namespace. Delete the systems and flows that use entities in the namespace before performing this action.</p>
rusoto/services/iotthingsgraph/src/generated.rs