this.tag = tag;
            this.useForSubtypes = useForSubtypes;
            this.serializer = serializer;
        }
    }

    private static class TaggedTypeSerializer<T> extends AbstractSerializer<T> {
        private static final int JAVA_TYPE = 1; // Reserve 0 for null (to be added later)
        private static final TypeInfo JAVA_SERIALIZATION = new TypeInfo(JAVA_TYPE, true, new DefaultSerializer<Object>());

Class <org.gradle.internal.serialize.AbstractSerializer> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (AbstractSerializer.java:0)