Describe the bug
We have a model Entity with a property schema:

Entity:
      type: object
      additionalProperties: false
      properties:
        schema:
          allOf:
            - "$ref": "#/components/schemas/SchemaSummary"
          nullable: true

and we also have a model EntitySchema.

The auto-generated client has a model EntitySchema, which refers to the property on Entity, but it silently ignores the explicitly defined EntitySchema model.

To Reproduce
Generate the client with Entity and EntitySchema as above.

Expected behavior
There should be two separate models, one for the Entity.schema property, one for EntitySchema.

OpenAPI Spec File
See above

Desktop (please complete the following information):

• OS: 10.15.4
• Python Version: 3.8.5
• openapi-python-client version v0.7.3