async fn delete_system_instance(
        &self,
        input: DeleteSystemInstanceRequest,
    ) -> Result<DeleteSystemInstanceResponse, RusotoError<DeleteSystemInstanceError>> {
        let mut request = self.new_signed_request("POST", "/");
        request.add_header(
            "x-amz-target",
            "IotThingsGraphFrontEndService.DeleteSystemInstance",
        );
        let encoded = serde_json::to_string(&input).unwrap();
        request.set_payload(Some(encoded));

        let response = self
            .sign_and_dispatch(request, DeleteSystemInstanceError::from_response)
            .await?;
        let mut response = response;
        let response = response.buffer().await.map_err(RusotoError::HttpDispatch)?;
        proto::json::ResponsePayload::new(&response)
            .deserialize::<DeleteSystemInstanceResponse, _>()
    }
<p>Deletes a system instance. Only system instances that have never been deployed, or that have been undeployed can be deleted.</p> <p>Users can create a new system instance that has the same ID as a deleted system instance.</p>
rusoto/services/iotthingsgraph/src/generated.rs