@Override
    public Optional<XmlNode> getConfiguration() {
        return Optional.of(delegate.getConfiguration()).map(Xpp3Dom::getDom);
    }

    @Override
    public String toString() {
        return delegate.toString();
    }

                .map(projects::get)
                .sorted(Comparator.comparingInt(order::get))
                .collect(Collectors.toList());
    }

    @Override
    public String toString() {
        return sorter.getSortedProjects().toString();
    }

                        .map(Object::toString)
                        .toList();
                request.getModelRepositoryHolder().merge(model.getRepositories(), false);
                List<String> newRepos = request.getModelRepositoryHolder().getRepositories().stream()
                        .map(Object::toString)
                        .toList();

     */
    public interface StringFormatter {

        // -----------/
        // - Methods -/
        // -----------/

        /**
         * Method toString.
         */
        String toString(InputLocation location);
    }

    }

    @Override
    public String toString() {
        StringBuilder buffer = new StringBuilder(64);
        buffer.append("{enabled=");
        buffer.append(enabled);
        buffer.append(", checksums=");
        buffer.append(checksumPolicy);
        buffer.append(", updates=");
        buffer.append(updatePolicy);
        buffer.append('}');
        return buffer.toString();
    }

                    "Invalid value specified for property {}: '{}'. Supported values are (case insensitive): {}",
                    MAVEN_PLUGIN_VALIDATION_KEY,
                    level,
                    Arrays.toString(ValidationReportLevel.values()));
            return DEFAULT_VALIDATION_LEVEL;
        }
    }

    private String pluginKey(String groupId, String artifactId, String version) {

        }

        private String nullify(String str) {
            return (str == null || str.isEmpty()) ? null : str;
        }

        public Object getKey() {
            return metadata.toString();
        }

        public String getRemoteFilename() {
            return metadata.getType();
        }

        public String getLocalFilename(ArtifactRepository repository) {

                            .append(repository.getUrl())
                            .append(")");
                }
            }
        }

        repos.append("]");

        return repos.toString();
    }

                        + cause.getMessage());
                pluginRealm.display(ps);

                throw new PluginContainerException(mojoDescriptor, pluginRealm, os.toString(), cause);
            } else if (cause instanceof LinkageError) {
                ByteArrayOutputStream os = new ByteArrayOutputStream(1024);
                PrintStream ps = new PrintStream(os);

            if (request.getModelId() != null || request.getLocation() != null) {
                source = new InputSource(
                        request.getModelId(), path != null ? path.toUri().toString() : null);
            }
            MavenStaxReader xml = new MavenStaxReader();
            xml.setAddDefaultEntities(request.isAddDefaultEntities());
            if (inputStream != null) {