code: public ApiResponse postGroupActivity(String groupId, String verb, String title,
              String content, String category, User user, Entity object,
              String objectType, String objectName, String objectContent) {
          Activity activity = Activity.newActivity(verb, title, content,
                  category, user, object, objectType, objectName, objectContent);
          return postGroupActivity(groupId, activity);
      }
docs: Creates and posts an activity to a group.
  
  @param groupId
  @param verb
  @param title
  @param content
  @param category
  @param user
  @param object
  @param objectType
  @param objectName
  @param objectContent
  @return