code: void completedStatus(String buildResult, String message) {
          completedStatus.add(new GhprbBuildResultMessage(
                  GHCommitState.valueOf(buildResult),
                  message
          ));
      }
docs: Use a custom status for when a build is completed. Can be called multiple times to set messages for different
  build results. Valid build results are {@code 'SUCCESS'}, {@code 'FAILURE'}, and {@code 'ERROR'}.