async fn search_entities(
        &self,
        input: SearchEntitiesRequest,
    ) -> Result<SearchEntitiesResponse, RusotoError<SearchEntitiesError>> {
        let mut request = self.new_signed_request("POST", "/");
        request.add_header(
            "x-amz-target",
            "IotThingsGraphFrontEndService.SearchEntities",
        );
        let encoded = serde_json::to_string(&input).unwrap();
        request.set_payload(Some(encoded));

        let response = self
            .sign_and_dispatch(request, SearchEntitiesError::from_response)
            .await?;
        let mut response = response;
        let response = response.buffer().await.map_err(RusotoError::HttpDispatch)?;
        proto::json::ResponsePayload::new(&response).deserialize::<SearchEntitiesResponse, _>()
    }
<p>Searches for entities of the specified type. You can search for entities in your namespace and the public namespace that you're tracking.</p>
rusoto/services/iotthingsgraph/src/generated.rs