async fn describe_application_snapshot(
        &self,
        input: DescribeApplicationSnapshotRequest,
    ) -> Result<DescribeApplicationSnapshotResponse, RusotoError<DescribeApplicationSnapshotError>>
    {
        let mut request = self.new_signed_request("POST", "/");
        request.add_header(
            "x-amz-target",
            "KinesisAnalytics_20180523.DescribeApplicationSnapshot",
        );
        let encoded = serde_json::to_string(&input).unwrap();
        request.set_payload(Some(encoded));

        let response = self
            .sign_and_dispatch(request, DescribeApplicationSnapshotError::from_response)
            .await?;
        let mut response = response;
        let response = response.buffer().await.map_err(RusotoError::HttpDispatch)?;
        proto::json::ResponsePayload::new(&response)
            .deserialize::<DescribeApplicationSnapshotResponse, _>()
    }
<p>Returns information about a snapshot of application state data.</p>
rusoto/services/kinesisanalyticsv2/src/generated.rs