docs: public List<Issue> getIssuesBySummary(String projectKey, String summaryField) throws RedmineException {
          if ((projectKey != null) && (projectKey.length() > 0)) {
              return transport.getObjectsList(Issue.class,
                      new BasicNameValuePair("subject", summaryField),
                      new BasicNameValuePair("project_id", projectKey));
          } else {
              return transport.getObjectsList(Issue.class,
                      new BasicNameValuePair("subject", summaryField));
          }
      }