Support of "x-examples" for "body" type parameters (like sagger-ui v2.x.x)

[Clem69B]

Content & configuration

Swagger/OpenAPI definition:

swagger: '2.0'
[...]
   post:
     tags:
       - _(deprecated) Triggers and Actions - V0 (use Triggers and Actions - V1 instead
     summary: Create an ActionPolicy
     description: 'The field `id` must not be provided, it will be automatically generated by the service as an UUID.<br><br>Usage of this API will be reported in your access log under ''routing'' category.<br><br>Restricted to API keys with at least one of the following roles : DATA_PROCESSING_W.'
     operationId: createUsingPOST_1
     consumes:
       - application/json
     produces:
       - application/json
     parameters:
       - in: body
         name: actionPolicy
         description: ActionPolicy to add
         required: true
         schema:
           $ref: '#/definitions/ActionPolicyV0'
         x-examples:
           default: |-
             {
                 "name": "name-aea80c1d-5777-4e20-822c-5e6871f428e5",
                 "enabled": true,
                 "triggers": {
                     "eventRuleIds": ["64e97cd3-9f49-43d9-84cf-7c4a806e3189"]
                 },
                 "actions": {
                     "emails": [{
                     "to": ["[email protected]"],
                     "cc": ["[email protected]"],
                     "cci": ["[email protected]"],
                     "subjectTemplate": "State change for {{stateKey}}",
                     "contentTemplate": "{{stateKey}} change from state {{previousState}} to state {{newState}} at {{timestamp}}"
                     }],
                     "sms": [{
                         "destinationPhoneNumbers": ["+33601234567"],
                         "contentTemplate": "{{stateKey}} new state {{newState}} at {{timestamp}}"
                     }]
                 }
             }
     responses:
       '200':
         description: ActionPolicy created
         schema:
           $ref: '#/definitions/ActionPolicyV0'
     security:
       - X-API-KEY:
           - global
     deprecated: true
[...]

Is your feature request related to a problem?

We have recently moved from swagger-ui 2.X.X to swagger-ui 3.X.X
In swagger-ui 2.x.x, "x-examples" are interpreted :

In swagger-ui 3.x.x, "x-examples" are ignored :

Describe the solution you'd like

The same behaviour as swagger-ui 2.X.X would be perfect

Describe alternatives you've considered

We know that "x-examples" is a vendor extension, and not a part of the swagger V2 specification. In fact, nothing seems to exist for body request examples.
The migration to OpenAPI v3 will be a good answer, but requires much more work on our side (annotation migration, springfox to springdoc migration, etc.).

Thankyou for any response

[hkosova]

Duplicate of #3233.