async fn list_container_instances(
        &self,
        input: ListContainerInstancesRequest,
    ) -> Result<ListContainerInstancesResponse, RusotoError<ListContainerInstancesError>> {
        let mut request = self.new_signed_request("POST", "/");
        request.add_header(
            "x-amz-target",
            "AmazonEC2ContainerServiceV20141113.ListContainerInstances",
        );
        let encoded = serde_json::to_string(&input).unwrap();
        request.set_payload(Some(encoded));

        let response = self
            .sign_and_dispatch(request, ListContainerInstancesError::from_response)
            .await?;
        let mut response = response;
        let response = response.buffer().await.map_err(RusotoError::HttpDispatch)?;
        proto::json::ResponsePayload::new(&response)
            .deserialize::<ListContainerInstancesResponse, _>()
    }
<p>Returns a list of container instances in a specified cluster. You can filter the results of a <code>ListContainerInstances</code> operation with cluster query language statements inside the <code>filter</code> parameter. For more information, see <a href="https://docs.aws.amazon.com/AmazonECS/latest/developerguide/cluster-query-language.html">Cluster Query Language</a> in the <i>Amazon Elastic Container Service Developer Guide</i>.</p>
rusoto/services/ecs/src/generated.rs