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// Record to build
public record NameAge(String firstName, String lastName, Option<String> middleName, int age) {

    static NameAgeBuilderStage1 builder() {
        return firstName -> lastName -> middleName -> age -> new NameAge(firstName, lastName, middleName, age);
    }

    interface NameAgeBuilderStage1 { NameAgeBuilderStage2 firstName(String firstName); }
    interface NameAgeBuilderStage2 { NameAgeBuilderStage3 lastName(String lastName); }
    interface NameAgeBuilderStage3 { NameAgeBuilderStage4 middleName(Option<String> middleName); }

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public Promise<Comment.Id> addComment(Option<User.Id> userId, Option<Publication.Id> publicationId, Option<String> commentText) {
    return
        validateAndLoad(userId, publicationId, commentText)
            .map(this::makeComment)
            .flatMap(commentService::addComment);
}

private Comment makeComment(User user, Publication publication, String comment) {
    return Comment.newComment(user.id(), publication.id(), comment);
}

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public Result<Comment.Id> addComment(Option<User.Id> userId, Option<Publication.Id> publicationId, Option<String> commentText) {
    return
        validateAndLoad(userId, publicationId, commentText)
            .map(SimpleCallFPRefactored::makeComment)
            .flatMap(commentService::addComment);
}

private static Comment makeComment(User user, Publication publication, String comment) {
    return Comment.newComment(user.id(), publication.id(), comment);
}

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public Result<Comment.Id> addComment(Option<User.Id> userId, Option<Publication.Id> publicationId, Option<String> commentText) {
    return
        all(
            userId.toResult(Errors.UNKNOWN_USER).flatMap(userService::find),
            publicationId.toResult(Errors.UNKNOWN_PUBLICATION).flatMap(publicationService::find),
            commentText.toResult(Errors.INVALID_COMMENT)
        ).map((user, publication, comment) -> Comment.newComment(user.id(), publication.id(), comment))
         .flatMap(commentService::addComment);
}

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...
  var value1 = service1.find(...);
  ...
  var value2 = service2.find(value1.field1());
  ...
  var value3 = service3.find(value2.field2());
...

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...
  var comment = commentService.find(commentId);
  var commentStats = commentStatsService.find(comment.statsId());
...

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public Comment.Id addComment(User.Id userId, Publication.Id publicationId, String commentText) {
    validateAddCommentParameters(userId, publicationId, commentText);

    return commentService.addComment(makeComment(userId, publicationId, commentText));
}

private static Comment makeComment(User.Id userId, Publication.Id publicationId, String commentText) {
    return Comment.newComment(userId, publicationId, commentText);
}

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public Comment.Id addComment(User.Id userId, Publication.Id publicationId, String commentText) {
    if (userId == null || userService.find(userId) == null) {
        throw new UnknownUserException();
    }

    if (publicationId == null || publicationService.find(publicationId) == null) {
        throw new UnknownPublicationException();
    }

    if (commentText == null) {

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import java.util.List;
import java.util.Optional;
import java.util.Set;
import java.util.stream.Collectors;

@Singleton
public class FeatureModelsType {
    public static final int FEATURE_ANY_OPTION_INDEX = 0;
    private final Context context;

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    operation1(args...)
        .flatMap(value1 -> operation2(args...))
        .flatMap(value2 -> operation3(args...))
        ...
        .flatMap(valueN-1 -> operationN(args...));