Repro for an issue with the micronaut swagger .yml gen that results in the required field being a list instead of a boolean.

Repro steps

./gradlew clean build
cat build/tmp/kapt3/classes/main/META-INF/swagger/repro-0.1.yml

# You should see the following
openapi: 3.0.1
info:
  title: repro
  description: desc
  version: "0.1"
paths:
  /v1/repro/repro:
    post:
      tags:
      - 'ReproController '
      summary: summary
      description: desc
      operationId: id
      parameters: []
      responses:
        default:
          description: id default response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ReproResponse'
components:
  schemas:
    ReproResponse:
      type: object
      properties:
        id:
          required:
          - "true"
          type: string
          description: This is not nullable
          nullable: true
      description: Respond payload for an upload request

The required field in the ReproResponse object should be a boolean with a value of true. Instead, it's a list with a string value of "true".

The object is defined in src/main/kotlin/ai/whylabs/repro/ReproResponse.kt.

This results in the generated types for that object being nullable. The only workaround I've found is to use the requiredProperties field in the class level Schema annotation, but that's painful for a lot of reasons.