code: private Set<Artifact> getProjectPluginManagement() {
          Set<Artifact> result = new LinkedHashSet<Artifact>();
          PluginManagement pluginManagement = getProject().getPluginManagement();
          if (pluginManagement != null) {
              for (Plugin plugin : pluginManagement.getPlugins()) {
                  result.add(toArtifact(plugin));
              }
          }
          return result;
      }
docs: Returns all dependencies defined in dependency management of the root pom.
  
  @return