How to handle response and HTTP-status directly in decoder?

in class feign.AsyncResponseHandler

      if (Response.class == returnType) {
        if (response.body() == null) {
          resultFuture.complete(response);
        } else if (response.body().length() == null
            || response.body().length() > MAX_RESPONSE_BUFFER_SIZE) {
          shouldClose = false;
          resultFuture.complete(response);
        } else {
          // Ensure the response body is disconnected
          final byte[] bodyData = Util.toByteArray(response.body().asInputStream());
          resultFuture.complete(response.toBuilder().body(bodyData).build());
        }
      } else if (response.status() >= 200 && response.status() < 300) {
        if (isVoidType(returnType)) {
          resultFuture.complete(null);
        } else {
          final Object result = decode(response, returnType);
          shouldClose = closeAfterDecode;
          resultFuture.complete(result);
        }
      } else if (decode404 && response.status() == 404 && !isVoidType(returnType)) {
        final Object result = decode(response, returnType);
        shouldClose = closeAfterDecode;
        resultFuture.complete(result);
      } else {
        resultFuture.completeExceptionally(errorDecoder.decode(configKey, response));
      }

decoder only takes effect when http-status=404 or http-status>=200 && http-status < 300
Whether the decoder can be configured to take effect directly so that the user handles http-status and response himself ?
just like Feign.Builder.forceDecoding=true,but Feign.Builder.forceDecoding not public

Start by reading the response-handling branch in feign.AsyncResponseHandler and the existing Feign.Builder.forceDecoding behavior. Trace how decoder and errorDecoder are selected for each HTTP status. Done means the desired public configuration and its handling of status and response are defined, with tests covering the new behavior.