while (iterator.hasNext()) {
            MavenProject project = iterator.next();
            projectNames.append(project.getGroupId()).append(":").append(project.getArtifactId());
            if (iterator.hasNext()) {
                projectNames.append(", ");
            }
        }
        return projectNames.toString();
    }

                    // Add the main POM as a build POM with "build" classifier
                    result.add(new DefaultArtifact(
                            main.getGroupId(),
                            main.getArtifactId(),
                            BUILD_POM_CLASSIFIER,
                            main.getExtension(),
                            main.getVersion(),
                            main.getProperties(),

                }
            }
        }
        return version;
    }

    public static String versionlessKey(Artifact artifact) {
        return versionlessKey(artifact.getGroupId(), artifact.getArtifactId());
    }

    public static String versionlessKey(String groupId, String artifactId) {
        notBlank(groupId, "groupId can neither be null, empty nor blank");

    public PluginDescriptor() {}

    public PluginDescriptor(PluginDescriptor original) {
        this.setGroupId(original.getGroupId());
        this.setArtifactId(original.getArtifactId());
        this.setVersion(original.getVersion());
        this.setGoalPrefix(original.getGoalPrefix());
        this.setInheritedByDefault(original.isInheritedByDefault());
        this.setName(original.getName());

    }

    protected void mergeModel_ArtifactId(
            Model target, Model source, boolean sourceDominant, Map<Object, Object> context) {
        String src = source.getArtifactId();
        if (src != null) {
            if (sourceDominant || target.getArtifactId() == null) {
                target.setArtifactId(src);
                target.setLocation("artifactId", source.getLocation("artifactId"));
            }
        }
    }

                            if (Objects.equals(artifact.getGroupId(), groupId)
                                    && Objects.equals(artifact.getArtifactId(), artifactId)) {
                                // here groupId and artifactId cannot be null
                                return new PluginInfo(groupId, artifactId, goalPrefix, name);
                            } else {

            MavenProject project = event.getProject();

            logger.info("");

            // -------< groupId:artifactId >-------
            String projectKey = project.getGroupId() + ':' + project.getArtifactId();

            final String preHeader = "--< ";
            final String postHeader = " >--";

            final int headerLen = preHeader.length() + projectKey.length() + postHeader.length();

        for (Dependency dependency : dependencies) {
            org.eclipse.aether.artifact.Artifact a = dependency.getArtifact();
            String key = ArtifactUtils.key(a.getGroupId(), a.getArtifactId(), a.getVersion());
            if (!projectKeys.contains(key)) {
                return false;
            }
        }

        return true;
    }

            throws ArtifactMetadataRetrievalException {
        Set<Artifact> dependencies = new HashSet<>();

        if ("g".equals(artifact.getArtifactId())) {
            Artifact a = null;
            try {
                a = factory.createBuildArtifact("org.apache.maven", "h", "1.0", "jar");
                dependencies.add(a);
            } catch (Exception e) {

                            .anyMatch(project -> project.getGroupId().equals(plugin.getGroupId())
                                    && project.getArtifactId().equals(plugin.getArtifactId())
                                    && project.getVersion().equals(plugin.getVersion()));

                    return exception.getResults().stream()