code: public ResultsWrapper<Issue> getIssues(Map<String, String> parameters) throws RedmineException {
          return DirectObjectsSearcher.getObjectsListNoPaging(transport, parameters, Issue.class);
      }
docs: Direct method to search for issues using any Redmine REST API parameters you want.
  <p>Unlike other getXXXObjects() methods in this library, this one does NOT handle paging for you so
  you have to provide "offset" and "limit" parameters if you want to control paging.
  
  <p>Sample usage:
  <pre>
  final Map<String, String> params = new HashMap<String, String>();
  params.put("project_id", projectId);
  params.put("subject", "~free_form_search");
  final List<Issue> issues = issueManager.getIssues(params);
  </pre>
  
  @param parameters the http parameters key/value pairs to append to the rest api request
  @return resultsWrapper with raw response from Redmine REST API
  @throws RedmineAuthenticationException invalid or no API access key is used with the server, which
  requires authorization. Check the constructor arguments.
  @throws RedmineException