How to use com.linecorp.bot.client

@Override
public CompletableFuture<MembersIdsResponse> getRoomMembersIds(
    final String roomId, final String start) {
  return toFuture(retrofitImpl.getMembersIds(ORG_TYPE_ROOM, roomId, start));
}

@Override
public CompletableFuture<UserProfileResponse> getGroupMemberProfile(
    final String groupId, final String userId) {
  return toFuture(retrofitImpl.getMemberProfile(ORG_TYPE_GROUP, groupId, userId));
}

@Override
public CompletableFuture<BotApiResponse> linkRichMenuIdToUser(
    final String userId, final String richMenuId) {
  return toBotApiFuture(retrofitImpl.linkRichMenuToUser(userId, richMenuId));
}

/**
 * Set fixed channel token. This overwrites {@link #channelTokenSupplier(ChannelTokenSupplier)}.
 *
 * @see #channelTokenSupplier(ChannelTokenSupplier)
 */
public LineMessagingClientBuilder channelToken(String channelToken) {
  this.channelTokenSupplier(FixedChannelTokenSupplier.of(channelToken));
  return this;
}

@Override
public CompletableFuture<BotApiResponse> pushMessage(final PushMessage pushMessage) {
  return toFuture(retrofitImpl.pushMessage(pushMessage));
}

@Override
public CompletableFuture<BotApiResponse> leaveGroup(final String groupId) {
  return toFuture(retrofitImpl.leaveGroup(groupId));
}

@Override
public CompletableFuture<RichMenuIdResponse> getRichMenuIdOfUser(final String userId) {
  return toFuture(retrofitImpl.getRichMenuIdOfUser(userId));
}

@Override
public CompletableFuture<BotApiResponse> multicast(final Multicast multicast) {
  return toFuture(retrofitImpl.multicast(multicast));
}

@Override
public CompletableFuture<MessageContentResponse> getRichMenuImage(final String richMenuId) {
  return toMessageContentResponseFuture(retrofitImpl.getRichMenuImage(richMenuId));
}

@Override
public CompletableFuture<BotApiResponse> setDefaultRichMenu(final String richMenuId) {
  return toBotApiFuture(retrofitImpl.setDefaultRichMenu(richMenuId));
}

@Override
public CompletableFuture<BotApiResponse> unlinkRichMenuIdFromUser(final String userId) {
  return toBotApiFuture(retrofitImpl.unlinkRichMenuIdFromUser(userId));
}

@Override
public CompletableFuture<RichMenuListResponse> getRichMenuList() {
  return toFuture(retrofitImpl.getRichMenuList());
}

@Override
public CompletableFuture<RichMenuIdResponse> createRichMenu(final RichMenu richMenu) {
  return toFuture(retrofitImpl.createRichMenu(richMenu));
}

@Override
public CompletableFuture<BotApiResponse> leaveRoom(final String roomId) {
  return toFuture(retrofitImpl.leaveRoom(roomId));
}

@Override
public CompletableFuture<MessageContentResponse> getMessageContent(final String messageId) {
  return toMessageContentResponseFuture(retrofitImpl.getMessageContent(messageId));
}

  /**
   * Creates a new {@link LineMessagingService}.
   */
  public LineMessagingClient build() {
    return new LineMessagingClientImpl(buildRetrofitIface());
  }
}

@Override
public LiffAppAddResponse addLiffApp(final LiffAppAddRequest liffAppAddRequest) {
  return syncGet(retrofitImpl.addLiffApp(liffAppAddRequest));
}

@Override
public LiffAppsResponse getAllLiffApps() {
  return syncGet(retrofitImpl.getAllLiffApps());
}

@Override
public CompletableFuture<MembersIdsResponse> getGroupMembersIds(
    final String groupId, final String start) {
  return toFuture(retrofitImpl.getMembersIds(ORG_TYPE_GROUP, groupId, start));
}

@Override
public CompletableFuture<UserProfileResponse> getRoomMemberProfile(
    final String roomId, final String userId) {
  return toFuture(retrofitImpl.getMemberProfile(ORG_TYPE_ROOM, roomId, userId));
}