code:     public void addRecipients(final ExtendedEmailPublisherContext context, EnvVars env, Set<InternetAddress> to, Set<InternetAddress> cc, Set<InternetAddress> bcc) {
          final class Debug implements RecipientProviderUtilities.IDebug {
              private final ExtendedEmailPublisherDescriptor descriptor
                      = Jenkins.getActiveInstance().getDescriptorByType(ExtendedEmailPublisherDescriptor.class);
  
              private final PrintStream logger = context.getListener().getLogger();
  
              public void send(final String format, final Object... args) {
                  descriptor.debug(logger, format, args);
              }
          }
          final Debug debug = new Debug();
          Run<?,?> run = context.getRun();
          final Result runResult = run.getResult();
          if (run instanceof AbstractBuild) {
              Set<User> users = ((AbstractBuild<?,?>)run).getCulprits();
              RecipientProviderUtilities.addUsers(users, context.getListener(), env, to, cc, bcc, debug);
          } else if (runResult != null) {
              List<Run<?, ?>> builds = new ArrayList<>();
              Run<?, ?> build = run;
              builds.add(build);
              build = build.getPreviousCompletedBuild();
              while (build != null) {
                  final Result buildResult = build.getResult();
                  if (buildResult != null) {
                      if (buildResult.isWorseThan(Result.SUCCESS)) {
                          debug.send("Including build %s with status %s", build.getId(), buildResult);
                          builds.add(build);
                      } else {
                          break;
                      }
                  }
                  build = build.getPreviousCompletedBuild();
              }
              Set<User> users = RecipientProviderUtilities.getChangeSetAuthors(builds, debug);
              RecipientProviderUtilities.addUsers(users, context.getListener(), env, to, cc, bcc, debug);
          }
      }
  
      @Extension
  