code: public List<Epic> getEpics(Object groupIdOrPath, Integer authorId, String labels, EpicOrderBy orderBy,
              SortOrder sortOrder, String search) throws GitLabApiException {
          return (getEpics(groupIdOrPath, authorId, labels, orderBy, sortOrder, search, getDefaultPerPage()).all());
      }
docs: Gets all epics of the requested group and its subgroups.
  
  <pre><code>GitLab Endpoint: GET /groups/:id/epics</code></pre>
  
  @param groupIdOrPath the group ID, path of the group, or a Group instance holding the group ID or path
  @param authorId returns epics created by the given user id
  @param labels return epics matching a comma separated list of labels names.
  Label names from the epic group or a parent group can be used
  @param orderBy return epics ordered by CREATED_AT or UPDATED_AT. Default is CREATED_AT
  @param sortOrder return epics sorted in ASC or DESC order. Default is DESC
  @param search search epics against their title and description
  @return a list of matching epics of the requested group and its subgroups
  @throws GitLabApiException if any exception occurs