[BUG] OpenAPI 4.0.2 not able to generate anyOf models.

Created by: charmygarg

Description

I have created a swagger file openapi: 3.0.0 having Account and Contact as references in anyOf something like this:

anyOf:
              - $ref: "#/components/schemas/Account"
              - $ref: "#/components/schemas/Contact"

openapi-generator version

4.0.2

Steps to reproduce

After running mvn generate-sources command swagger generates models in /target folder. The issue here is that swagger is not able to generate class AnyOfAccountContact which it should be.

The error looks like this: