async fn list_task_definition_families(
        &self,
        input: ListTaskDefinitionFamiliesRequest,
    ) -> Result<ListTaskDefinitionFamiliesResponse, RusotoError<ListTaskDefinitionFamiliesError>>
    {
        let mut request = self.new_signed_request("POST", "/");
        request.add_header(
            "x-amz-target",
            "AmazonEC2ContainerServiceV20141113.ListTaskDefinitionFamilies",
        );
        let encoded = serde_json::to_string(&input).unwrap();
        request.set_payload(Some(encoded));

        let response = self
            .sign_and_dispatch(request, ListTaskDefinitionFamiliesError::from_response)
            .await?;
        let mut response = response;
        let response = response.buffer().await.map_err(RusotoError::HttpDispatch)?;
        proto::json::ResponsePayload::new(&response)
            .deserialize::<ListTaskDefinitionFamiliesResponse, _>()
    }
<p>Returns a list of task definition families that are registered to your account (which may include task definition families that no longer have any <code>ACTIVE</code> task definition revisions).</p> <p>You can filter out task definition families that do not contain any <code>ACTIVE</code> task definition revisions by setting the <code>status</code> parameter to <code>ACTIVE</code>. You can also filter the results with the <code>familyPrefix</code> parameter.</p>
rusoto/services/ecs/src/generated.rs