No DTO exported with Axios when using POJO in multipart/form-data

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
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Description

Generating a typescript-axios client from my openapi.json file fails to produce compilable code.

My Typescript compiler outputs the following error:

Failed to compile.

TS2552: Cannot find name 'NewUserDto'. Did you mean 'UserDto'?
    422 |          * @throws {RequiredError}
    423 |          */
  > 424 |         createUser: async (newUser: NewUserDto, profilePicture?: File, options: AxiosRequestConfig = {}): Promise<RequestArgs> => {
        |                                     ^^^^^^^^^^
    425 |             // verify required parameter 'newUser' is not null or undefined
    426 |             assertParamExists('createUser', 'newUser', newUser)
    427 |             const localVarPath = `/api/users/create`;

Context

I am using springdoc to generate an openApi.json file from a SpringBoot application.
The java code of my controller method of interest is the following one:

@SecurityRequirements
@PostMapping(value = CREATE_USER_PATH, consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
@ResponseStatus(code = HttpStatus.CREATED)
public void createUser(@Valid @RequestPart NewUserDto newUser, @RequestPart(required = false) MultipartFile profilePicture){
    this.userService.createUser(newUser, profilePicture);
}

openapi-generator version

6.6.0-SNAPSHOT/

OpenAPI declaration file content or url

{
  "openapi": "3.0.1",
  "info": {
    "title": "OpenAPI definition",
    "version": "v0"
  },
  "servers": [
    {
      "url": "http://localhost:8080",
      "description": "Generated server url"
    }
  ],
  "tags": [
    {
      "description": "Declares the API methods dealing directly with the users.",
      "name": "user-controller"
    }
  ],
  "paths": {
    "/api/users/create": {
      "post": {
        "description": "Creates a user account.",
        "operationId": "createUser",
        "requestBody": {
          "content": {
            "multipart/form-data": {
              "schema": {
                "type": "object",
                "properties": {
                  "newUser": {
                    "$ref": "#/components/schemas/NewUserDto"
                  },
                  "profilePicture": {
                    "type": "string",
                    "format": "binary",
                    "description": "The optional user profile picture."
                  }
                },
                "required": [
                  "newUser"
                ]
              }
            }
          }
        },
        "responses": {
          "201": {
            "description": "Created"
          }
        },
        "security": [],
        "summary": "Creates a user account.",
        "tags": [
          "user-controller"
        ]
      }
    }
  },
  "components": {
    "schemas": {
      "NewUserDto": {
        "type": "object",
        "description": "The DTO used to create a new user profile.",
        "properties": {
          "email": {
            "maxLength": 50,
            "minLength": 0,
            "type": "string",
            "example": "marcLambert@example.com"
          },
          "firstName": {
            "maxLength": 30,
            "minLength": 1,
            "type": "string",
            "example": "Marc"
          },
          "lastName": {
            "maxLength": 30,
            "minLength": 1,
            "type": "string",
            "example": "Lambert"
          },
          "password": {
            "maxLength": 100,
            "minLength": 8,
            "type": "string",
            "example": "t0pSecret!"
          },
          "status": {
            "maxLength": 100,
            "minLength": 0,
            "type": "string",
            "example": "I am a bit special ^^"
          }
        },
        "required": [
          "email",
          "firstName",
          "lastName",
          "password"
        ]
      }
    }
  }
}

Generation Details

Steps to reproduce

$ java -jar openapi-generator-cli-6.6.0-20230415.080830-20.jar generate \
 -g typescript-axios \
 -i ../Desktop/openapi.json \
 -o ./out/ 

The generated code in .out/api.ts does not compile.

Related issues/PRs

Suggest a fix

Run the provided Java CLI command with the supplied openapi.json and inspect the generated .out/api.ts, focusing on the multipart/form-data createUser operation. Confirm the missing NewUserDto reference and compare the generated exports; done means the typescript-axios output compiles and exposes the DTO used by createUser.