AccountByID
BMailAccountSettings* AccountByID(int32 id);
BMailAccountSettings* account = accounts.AccountByID(Account());
BMailAccountSettings* accountSettings = accounts.AccountByID(fAccountID);
BMailAccountSettings* account = accounts.AccountByID(accountID);
BMailAccountSettings* account = accounts.AccountByID(fAccountID);
account = accounts.AccountByID(
BMailAccountSettings* settings = accounts.AccountByID(account);