boolean isLambda,
        @Nullable Object value
    ) {
        if (classLoaderHash == null) {
            return new UnknownImplementationSnapshot(classIdentifier, UnknownReason.UNKNOWN_CLASSLOADER);
        }

        if (isLambda) {
            return serializedLambdaFor(value)
                .<ImplementationSnapshot>map(it -> new LambdaImplementationSnapshot(classLoaderHash, it))

import javax.annotation.Nullable;
import java.util.Objects;

public class UnknownImplementationSnapshot extends ImplementationSnapshot {

    public enum UnknownReason {
        UNKNOWN_CLASSLOADER(
            "was loaded with an unknown classloader (class '%s').",
            "Gradle cannot track the implementation for classes loaded with an unknown classloader.",

        copy.classIdentifier == original.classIdentifier
        copy.classLoaderHash == null
        copy.unknownReason == UnknownImplementationSnapshot.UnknownReason.UNKNOWN_CLASSLOADER
    }

    def "serializes implementation properties with untracked lambda"() {
        def original = ImplementationSnapshot.of('someClassName$$Lambda/312454364', TestHashCodes.hashCodeFrom(1234))