Swagger schema with oneOf with List of object is no generating sample response in UI

Hi sudha78,

I'm not 100% sure on what you are trying to achieve, but here's a definition showing two flavours similar to above.

openapi: 3.0.3
info:
  title: Simple Pets API
  description: |-
    This is a sample Pets API showcasing some `oneOf` scenarios
  version: 0.0.1
tags:
  - name: pets
    description: Everything about your Pets
paths:
  /pets:
    get:
      tags:
        - pets
      summary: Get pets from catalog
      description: Returns a list of pets found on the server
      operationId: getPets
      responses:
        '200':
          description: successful operation
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Pets'
  /animals:
    get:
      tags:
        - pets
      summary: Get pets from catalog
      description: Returns a list of pets found on the server
      operationId: getAnimals
      responses:
        '200':
          description: successful operation
          content:
            application/json:
              schema:
                oneOf: 
                  - $ref: '#/components/schemas/Cat1'
                  - $ref: '#/components/schemas/Dog1'            
components:
  schemas:
    Dog:
      type: object
      properties:
        barks:
          type: boolean
          example: true
        likesFetch:
          type: boolean
          example: true
    Cat:
      type: object
      properties:
        meows:
          type: boolean
          example: true
        likesFetch:
          type: boolean
          example: false
    Pets:
      type: array
      items:
        oneOf:
          - $ref: '#/components/schemas/Cat'
          - $ref: '#/components/schemas/Dog' 
    Animal:
      type: object
      properties:
        breed:
          type: string
          example: poodle
    Cat1:
      type: array
      items:
        $ref: '#/components/schemas/Animal'
    Dog1:
      type: array
      items:
        $ref: '#/components/schemas/Animal'