code: public void getAllMemberInfo(int offset, int limit, final AVIMConversationMemberQueryCallback callback) {
      QueryConditions conditions = new QueryConditions();
      conditions.addWhereItem("cid", QueryOperation.EQUAL_OP, this.conversationId);
      conditions.setSkip(offset);
      conditions.setLimit(limit);
      queryMemberInfo(conditions, callback);
    }
docs: 获取当前对话的所有角色信息
  @param offset    查询结果的起始点
  @param limit     查询结果集上限
  @param callback  结果回调函数