@Experimental
@ThreadSafe
@Immutable
public interface XmlNode {

    String CHILDREN_COMBINATION_MODE_ATTRIBUTE = "combine.children";

    String CHILDREN_COMBINATION_MERGE = "merge";

    String CHILDREN_COMBINATION_APPEND = "append";

    /**
     * This default mode for combining children DOMs during merge means that where element names match, the process will

     */
    <T> void set(@Nonnull Key<T> key, @Nullable T value);

    /**
     * Associates the specified session data with the given key if the key is currently mapped to the given value. This
     * method provides an atomic compare-and-update of some key's value.
     *
     * @param key the key under which to store the session data, must not be {@code null}

            }
            trace = trace.getParent();
        }
        return collectStepTrace;
    }

    /**
     * The event "artifact resolved" if fired WHENEVER an artifact is resolved, BUT it happens also when an artifact
     * descriptor (model, the POM) is being built, and parent (and parent of parent...) is being asked for. Hence, this

    }

    private static String createPath(List<String> elements) {
        StringBuilder buffer = new StringBuilder(256);
        for (String s : elements) {
            buffer.append(s).append(File.separator);
        }
        return buffer.toString().substring(0, buffer.toString().length() - 1);
    }

private static final Xpp3Dom[] EMPTY_DOM_ARRAY; public static final String CHILDREN_COMBINATION_MODE_ATTRIBUTE = combine.children; public static final String CHILDREN_COMBINATION_MERGE = merge; public static final String CHILDREN_COMBINATION_APPEND = append; public static final String DEFAULT_CHILDREN_COMBINATION_MODE = merge; public static final String SELF_COMBINATION_MODE_ATTRIBUTE = combine.self; public static final String SELF_COMBINATION_OVERRIDE = override; public static final String SELF_COMBINATION_MERGE...

        buffer.append("<?xml version='1.0'?>");
        buffer.append("<project>");
        buffer.append("<modelVersion>4.0.0</modelVersion>");
        buffer.append("<groupId>").append(artifact.getGroupId()).append("</groupId>");
        buffer.append("<artifactId>").append(artifact.getArtifactId()).append("</artifactId>");
        buffer.append("<version>").append(artifact.getBaseVersion()).append("</version>");

                messageBuffer
                        .append("<configuration>")
                        .append(LS)
                        .append("  ...")
                        .append(LS);
                messageBuffer
                        .append("  <")
                        .append(alias)
                        .append(">VALUE</")
                        .append(alias)

        return append(value, start, end);
    }

    /**
     * Append content to the message buffer.
     *
     * @param value the content to append
     * @return the current builder
     */
    @Nonnull
    default MessageBuilder a(CharSequence value) {
        return append(value);
    }

    /**
     * Append content to the message buffer.
     *
     * @param value the content to append

        sb.append("      id: ").append(getId()).append(LS);
        sb.append("      url: ").append(getUrl()).append(LS);
        sb.append("   layout: ").append(layout != null ? layout : "none");

        if (proxy != null) {
            sb.append(LS)
                    .append("    proxy: ")
                    .append(proxy.getHost())
                    .append(':')

                .append(":")
                .append(dependency.getVersion())
                .append("@")
                .append(dependency.getScope() == null ? "compile" : dependency.getScope());
        if (dependency.isOptional()) {
            stringBuilder.append("[optional]");
        }
        if (!dependency.getExclusions().isEmpty()) {
            stringBuilder.append("[").append(dependency.getExclusions().size()).append(" exclusions]");