Question: how to generate MultipartFile for binary string

Description

Hi, can you, please, help me generate array/collection of org.springframework.web.multipart.MultipartFile for files array:

type: array
items:
  type: string
  format: binary

Currently I only get collection of org.springframework.core.io.Resource. I tried typeMappings/importMappings/mustache templates, but w/o success.

I've created question regarding this problem on stackoverflow: https://stackoverflow.com/questions/73107663/how-to-generate-multipartfile-for-binary-string-by-openapitools.

openapi-generator version

openapi-generator-cli:5.0.1

OpenAPI declaration file content or url

{
  "generatorName": "spring",
  "library": "spring-cloud",
  "hideGenerationTimestamp": true,
  "globalProperties": {
    "skipFormModel": false
  },
  "openApiNullable": false,
  "java8": true,
  "jsr310": true
}

Command line used for generation

gradle file:

swaggerSources {
    assetApi {
        inputFile = file('swagger/api.yaml')
        code {
            language = 'spring'
            configFile = file("swagger/config.json")
            components = ['models': true, 'apis': true]
            templateDir = file('templates/java')
        }
    }
}

Steps to reproduce

N/A

Related issues/PRs

N/A

Suggest a fix/enhancement

If there's solution of this problem, probably it should be added to project's readme.

Start with the supplied OpenAPI binary-array declaration, the Spring generator configuration, and the custom templates/java directory; compare the generated Resource collection with the requested MultipartFile collection. Determine whether the mapping is supported, then document the confirmed configuration or limitation in the project README.