flow2schema/tests/samples/keys/types.yaml

-   kind: record
    fields:
    -   name: a
        value: {kind: string}
        required: true
    -   name: b
        value: {kind: boolean}
        required: true
    id: [keys, X]
-   kind: union
    variants:
    - {kind: literal, value: a}
    - {kind: literal, value: b}
    id: [keys, Y]