C# Client Generation: Method accepting multiple request types defined `oneOf` accepts only first request type

[nenadvicentic]

Describe the bug

When we have service method accepting multiple request types, defined as, for example:

    V2_myRequest:
      type: object
      required:
      - type
      properties:
        type:
          type: string
          enum:
          - t1
          - t2
          - t3
          - t4
          description: |
            - `t1`: Type1
            - `t2`: Type2
            - `t3`: Type3
            - `t4`: Type4
      oneOf:
        - $ref: "#/components/schemas/V2_myRequest_t1"
        - $ref: "#/components/schemas/V2_myRequest_t2"
        - $ref: "#/components/schemas/V2_myRequest_t3"
        - $ref: "#/components/schemas/V2_myRequest_t4"

Generated method only accepts only the first type:

public myMethodAsync(Type1 value) {
    ...
}

Version 14.4.x was generating the method with object type, so all the request types could have been passed in. Something like:

public myMethodAsync(object value) {
   ...
}

NSwag.ApiDescription.Client generates C# client

14.6.x

With which versions did you encounter this behavior.

14.6.2

Expected behavior

Or generate for overload for the method, with each type:

myMethodAsync(Type1 value) {
   ....
}

myMethodAsync(Type2 value) {
    ....
}

or generate method with object type like in previous versions (14.4.x).