async fn update_flow_template(
        &self,
        input: UpdateFlowTemplateRequest,
    ) -> Result<UpdateFlowTemplateResponse, RusotoError<UpdateFlowTemplateError>> {
        let mut request = self.new_signed_request("POST", "/");
        request.add_header(
            "x-amz-target",
            "IotThingsGraphFrontEndService.UpdateFlowTemplate",
        );
        let encoded = serde_json::to_string(&input).unwrap();
        request.set_payload(Some(encoded));

        let response = self
            .sign_and_dispatch(request, UpdateFlowTemplateError::from_response)
            .await?;
        let mut response = response;
        let response = response.buffer().await.map_err(RusotoError::HttpDispatch)?;
        proto::json::ResponsePayload::new(&response).deserialize::<UpdateFlowTemplateResponse, _>()
    }
<p>Updates the specified workflow. All deployed systems and system instances that use the workflow will see the changes in the flow when it is redeployed. If you don't want this behavior, copy the workflow (creating a new workflow with a different ID), and update the copy. The workflow can contain only entities in the specified namespace. </p>
rusoto/services/iotthingsgraph/src/generated.rs