code: public Issue issue(String name, Retrospective retrospective, Map<String, Object> attributes) {
          Issue issue = new Issue(instance);
  
          issue.setName(name);
          issue.setProject(retrospective.getProject());
          addAttributes(issue, attributes);
          issue.save();
          issue.getRetrospectives().add(retrospective);
          return issue;
      }
docs: Creates an Issue related to a Retrospective.
  
  @param name          The name of the Issue.
  @param retrospective The Retrospective to relate the Issue to.
  @param attributes    additional attributes for the Issue.
  @return The newly saved Issue.