}
    }

    private void addPlugin(Map<Plugin, Plugin> plugins, Plugin plugin) {
        Plugin cur = plugins.putIfAbsent(plugin, plugin);
        if (cur != null) {
            Map<String, PluginExecution> execs = new LinkedHashMap<>();
            cur.getExecutions().forEach(e -> execs.put(e.getId(), e));
            plugin.getExecutions().forEach(e -> {
                int i = 0;

    checkElementsNotNull(contents, n);
    Arrays.sort(contents, 0, n, comparator);
    int uniques = 1;
    for (int i = 1; i < n; i++) {
      E cur = contents[i];
      E prev = contents[uniques - 1];
      if (comparator.compare(cur, prev) != 0) {
        contents[uniques++] = cur;
      }
    }
    Arrays.fill(contents, uniques, n, null);
    return new RegularImmutableSortedSet<>(

    checkElementsNotNull(contents, n);
    Arrays.sort(contents, 0, n, comparator);
    int uniques = 1;
    for (int i = 1; i < n; i++) {
      E cur = contents[i];
      E prev = contents[uniques - 1];
      if (comparator.compare(cur, prev) != 0) {
        contents[uniques++] = cur;
      }
    }
    Arrays.fill(contents, uniques, n, null);
    if (uniques < contents.length / 2) {