private final String propertyName;
    private final String parentPropertyName;
    private final String typeName;

    public DefaultTypeValidationData(String pluginId, String propertyName, String parentPropertyName, String typeName) {
        this.pluginId = pluginId;
        this.propertyName = propertyName;
        this.parentPropertyName = parentPropertyName;
        this.typeName = typeName;
    }

    @Override

public interface TypeValidationDataSpec extends AdditionalDataSpec {
    TypeValidationDataSpec pluginId(String pluginId);
    TypeValidationDataSpec propertyName(String propertyName);
    TypeValidationDataSpec parentPropertyName(String parentPropertyName);
    TypeValidationDataSpec typeName(String typeName);

                .additionalData(TypeValidationDataSpec.class) {
                    it.propertyName("property")
                    it.typeName("type")
                    it.parentPropertyName("parent")
                    it.pluginId("id")
                }
        }

        when:
        def json = gson.toJson([problem])

        if (parentProperty == null) {
            return this;
        }
        String pp = getParentProperty(parentProperty);
        additionalData(TypeValidationDataSpec.class, data -> data.parentPropertyName(pp));
        parentPropertyAdditionalData = pp;
        return this;
    }

    @Override
    public Problem build() {
        Problem problem = super.build();