merged = true;
        } catch (Exception e) {
            throw new RepositoryException(e.getMessage(), e);
        }
    }

    @Override
    public boolean isMerged() {
        return merged;
    }

    @Override
    public String getGroupId() {
        return emptify(metadata.getGroupId());
    }

    @Override
    public String getArtifactId() {

        Metadata recessive = read(existing);

        merge(recessive);

        write(result, metadata);

        merged = true;
    }

    @Override
    public boolean isMerged() {
        return merged;
    }

    protected abstract void merge(Metadata recessive);

    static Metadata read(Path metadataPath) throws RepositoryException {
        if (!Files.exists(metadataPath)) {

    }

    private
    fun getMergedContributorPullRequests(pageNumber: Int): List<GitHubPullRequest> {
        val uri = "https://api.github.com/search/issues?q=is:pr+is:merged+repo:gradle/gradle+label:%22from:contributor%22&sort=updated&order=desc&per_page=$PAGE_SIZE&page=$pageNumber"
        return invokeGitHubApi(uri, GitHubPullRequestSearchResult::class.java).items
    }