code: public ChatRoomMemberList getChatRoomMembers(long roomId, int start, int count)
              throws APIConnectionException, APIRequestException {
          Preconditions.checkArgument(roomId > 0, "room id is invalid");
          Preconditions.checkArgument(start >= 0 && count > 0, "Illegal argument");
          ResponseWrapper responseWrapper = _httpClient.sendGet(_baseUrl + mChatRoomPath + "/" + roomId + "/members"
                  + "?start=" + start + "&count=" + count);
          return ChatRoomMemberList.fromResponse(responseWrapper, ChatRoomMemberList.class);
      }
docs: Get all member info of chat room
  
  @param roomId chat room id
  @param start  start index
  @param count member count
  @return {@link ChatRoomMemberList}
  @throws APIConnectionException connect exception
  @throws APIRequestException    request exception