code: public <ResultT> ResultT execute(
        final AwsRequest request,
        final Long requestTimeout,
        final Decoder<ResultT> resultDecoder
    ) {
      return proxy.execute(request, requestTimeout, resultDecoder);
    }
docs: Executes the AWS request, and decodes the result into an instance of the
  specified type. The response will be decoded using the codec registry specified when the app
  client was configured. If no codec registry was configured, a default codec registry will be
  used. The default codec registry supports the mappings specified <a
  href="http://mongodb.github.io/mongo-java-driver/3.1/bson/documents/#document">here</a>
  
  @param request the AWS request to execute.
  @param requestTimeout the number of milliseconds the client should wait for a response from the
  server before failing with an error.
  @param resultDecoder the {@link Decoder} to use to decode the result into a value.
  @param <ResultT> the type into which the response will be decoded.
  @return the decoded result value.