Using "content" in "parameters" doesn't work

[piotrzarzycki21]

Q&A (please complete the following information)

• OS: Windows 10 64bit
• Browser: Chrome
• Version: 69.0.3497.100 (Official Build) (64-bit)
• Method of installation: dist
• Swagger-UI version: 3.19.3
• Swagger/OpenAPI version: OpenAPI 3.0.1

Content & configuration

Example Swagger/OpenAPI definition:

"/myapi/mymethod": {
      "post": {
        "summary": "My Method.",
        "operationId": "myapimymethod",
        "tags": [
          "common"
        ],
        "parameters": [
          {
            "in": "query",
            "name": "params",
            "required": "true",
            "description": "Additional data for document",
            "content": {
                "application/json":{
                  "schema": {
                      "type": "object",
                      "properties": {
                          "firstname": {
                            "type": "string"
                          }
                      }
                  }
              }
            }
          }
        ],
        "requestBody": {
          "content": {
            "multipart/form-data": {
              "schema": {
                    "$ref": "./schemas/body/somedata.json#/somedata"
                }
              }
            }
        }
    }

Swagger-UI configuration options:

const ui = SwaggerUIBundle({
        url: "common.json",
        dom_id: '#swagger-ui',
        deepLinking: true,
        presets: [
          SwaggerUIBundle.presets.apis,
          SwaggerUIStandalonePreset
        ],
        plugins: [
          SwaggerUIBundle.plugins.DownloadUrl
        ],
        layout: "StandaloneLayout"
      })

Describe the bug you're encountering

I'm getting following results when content is being used in API description:

Open API documentation describing that I can use content inside parameters - section schema vs content

To reproduce...

Steps to reproduce the behavior:
Run in Swagger UI provided example.

Expected behavior

Work as it is described in OpenApi documentation.

Screenshots

You will get following results.

[hkosova]

Thanks for the report! This issue is being tracked in #4442.

[shockey]

Closing as a duplicate of #4442.