throw new NullPointerException(
"'key' is null; please provide Mandrill API key");
}
this.key = key;
users = new MandrillUsersApi(key);
messages = new MandrillMessagesApi(key);
tags = new MandrillTagsApi(key);
rejects = new MandrillRejectsApi(key);
whitelists = new MandrillWhitelistsApi(key);
senders = new MandrillSendersApi(key);