.<ImplementationSnapshot>map(it -> new LambdaImplementationSnapshot(classLoaderHash, it))
                .orElseGet(() -> new UnknownImplementationSnapshot(classIdentifier, UnknownReason.UNTRACKED_LAMBDA));
        }

        return new ClassImplementationSnapshot(classIdentifier, classLoaderHash);
    }

    protected ImplementationSnapshot(String classIdentifier) {

            "Gradle cannot track the implementation for classes loaded with an unknown classloader.",
            "Load your class by using one of Gradle's built-in ways."
        ),
        UNTRACKED_LAMBDA(
            "was implemented by the Java lambda '%s'.",
            "Using Java lambdas is not supported as task inputs.",
            "Use an (anonymous inner) class instead."
        );

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

    private ArrayValueSnapshot array(ValueSnapshot... elements) {
        return new ArrayValueSnapshot(ImmutableList.copyOf(elements))
    }