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Hello, I'm trying to use oneOf and allOf in my specification to support polymorphism in readme. Experimenting using example in here, my OAS looks like this:

{
  "openapi": "3.1.0",
  "info": {
    "title": "Polymorphism support",
    "version": "1.0.0"
  },
  "paths": {
    "/pets": {
      "patch": {
        "summary": "oneOf request with a nested allOf",
        "requestBody": {
          "content": {
            "application/json": {
              "schema": {
                "oneOf": [
                  {
                    "$ref": "#/components/schemas/Cat"
                  },
                  {
                    "$ref": "#/components/schemas/Dog"
                  }
                ],
                "discriminator": {
                  "propertyName": "pet_type"
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "default response",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/Pet"
                }
              }
            }
          }
        }
      }
    }
  },
  "components": {
    "schemas": {
      "Pet": {
        "type": "object",
        "required": ["pet_type"],
        "properties": {
          "pet_type": {
            "type": "string"
          }
        },
        "discriminator": {
          "propertyName": "pet_type"
        },
        "oneOf": [
          {
            "$ref": "#/components/schemas/Cat"
          },
          {
            "$ref": "#/components/schemas/Dog"
          }
        ]
      },
      "Dog": {
        "title": "Woof",
        "allOf": [
          {
            "$ref": "#/components/schemas/Pet"
          },
          {
            "type": "object",
            "properties": {
              "bark": {
                "type": "boolean"
              },
              "breed": {
                "type": "string",
                "enum": ["Dingo", "Husky", "Retriever", "Shepherd"]
              }
            }
          }
        ]
      },
      "Cat": {
        "title": "Meow",
        "type": "object",
        "allOf": [
          {
            "$ref": "#/components/schemas/Pet"
          },
          {
            "type": "object",
            "properties": {
              "hunts": {
                "type": "boolean"
              },
              "age": {
                "type": "integer"
              }
            }
          }
        ]
      }
    }
  }
}

This generates an UI that looks like

Notice that request and response are both empty despite the specification defining them. But, when I remove allOf clauses in Dog and Cat like below, with no other modifications, it correctly displays both options.

   "Dog":{
      "title":"Woof",
      "type":"object",
      "properties":{
         "bark":{
            "type":"boolean"
         },
         "breed":{
            "type":"string",
            "enum":[
               "Dingo",
               "Husky",
               "Retriever",
               "Shepherd"
            ]
         }
      }
   },
   "Cat":{
      "title":"Meow",
      "type":"object",
      "properties":{
         "hunts":{
            "type":"boolean"
         },
         "age":{
            "type":"integer"
         }
      }
   }

What may be my problem? Is allOf not supported? But the example used it successfully.

Thanks!