async fn list_flow_execution_messages(
        &self,
        input: ListFlowExecutionMessagesRequest,
    ) -> Result<ListFlowExecutionMessagesResponse, RusotoError<ListFlowExecutionMessagesError>>
    {
        let mut request = self.new_signed_request("POST", "/");
        request.add_header(
            "x-amz-target",
            "IotThingsGraphFrontEndService.ListFlowExecutionMessages",
        );
        let encoded = serde_json::to_string(&input).unwrap();
        request.set_payload(Some(encoded));

        let response = self
            .sign_and_dispatch(request, ListFlowExecutionMessagesError::from_response)
            .await?;
        let mut response = response;
        let response = response.buffer().await.map_err(RusotoError::HttpDispatch)?;
        proto::json::ResponsePayload::new(&response)
            .deserialize::<ListFlowExecutionMessagesResponse, _>()
    }
<p>Returns a list of objects that contain information about events in a flow execution.</p>
rusoto/services/iotthingsgraph/src/generated.rs