/**
 * Represents the complete changes in execution state
 */
public interface ExecutionStateChanges {

    /**
     * Returns all change messages for inputs and outputs.
     */
    ImmutableList<String> getChangeDescriptions();

    InputChangesInternal createInputChanges();

    static ExecutionStateChanges incremental(
        ImmutableList<String> changeDescriptions,
        InputFileChanges inputFileChanges,

    protected Optional<HashCode> getPreviousCacheKeyIfApplicable(C context) {
        return context.getChanges()
            .flatMap(changes -> context.getPreviousExecutionState()
                .filter(__ -> changes.getChangeDescriptions().isEmpty())
                .map(PreviousExecutionState::getCacheKey));
    }

    @Override
    protected UpToDateResult executeDelegate(UnitOfWork work, C context, CachingState cachingState) {

            .map(beforeExecution -> resolveExecutionStateChanges(work, context, beforeExecution))
            .map(changes -> new IncrementalChangesContext(context, changes.getChangeDescriptions(), changes))
            .orElseGet(() -> {
                ImmutableList<String> rebuildReason = context.getNonIncrementalReason()
                    .map(ImmutableList::of)
                    .orElse(UNTRACKED);