docs: public String[] getIssueKeys() {
          Issues issues = getAnnotation(Issues.class);
          if (issues == null) {
              return new String[0];
          }
          List<String> keys = new ArrayList<>();
          for (Issue issue : issues.value()) {
              keys.add(issue.value());
          }
          return keys.toArray(new String[keys.size()]);
      }