[C++][pistache-server] include not existing file "Object.h"

Description

In the generated file "DefaultApi.h" which includes "Object.h" but the "Object.h" not exist under the root output directory. Here already found the same issue reported in [cpprest] but I really can't find why this file was generated since the spec file is valid. #6512 #6905

Swagger-codegen version

2.4.5

Swagger declaration file content or url

spec

Command line used for generation

java -jar modules/swagger-codegen-cli/target/swagger-codegen-cli.jar generate \
-i swagger.yaml \
-l pistache-server \
-o /auto_code/cpp

Steps to reproduce

The auto generated files:

[root@kongfu cpp]# tree
.
├── api
│   ├── DefaultApi.cpp
│   └── DefaultApi.h
├── CMakeLists.txt
├── DefaultApiMainServer.cpp
├── impl
│   ├── DefaultApiImpl.cpp
│   └── DefaultApiImpl.h
├── model
│   ├── Interface.cpp
│   ├── Interface.h
│   ├── Link.cpp
│   ├── Link.h
│   ├── ModelBase.cpp
│   └── ModelBase.h
└── README.md

The DefaultApiImpl.h which includes "Object.h"

/*
 * DefaultApi.h
 *
 *
 */

#ifndef DefaultApi_H_
#define DefaultApi_H_


#include <pistache/endpoint.h>
#include <pistache/http.h>
#include <pistache/router.h>
#include <pistache/http_headers.h>

#include "Interface.h"
#include "Object.h"
#include <string>

namespace io {
namespace swagger {
namespace server {
namespace api {

using namespace io::swagger::server::model;

class  DefaultApi {

Related issues/PRs

#6512
#6905

Suggest a fix/enhancement

The Object.h should not be generated here?

Start with the generated api/DefaultApi.h and the pistache-server generator, then compare the supplied swagger.yaml with the related #6512 issue and #6905 pull request. Reproduce the generation command and trace why DefaultApi.h includes Object.h even though no Object.h is emitted; done means the generated output no longer has the invalid include and builds successfully.