code: public AccountNotes getAccountNotes(final String accountCode) {
          return doGET(Accounts.ACCOUNTS_RESOURCE + "/" + accountCode + AccountNotes.ACCOUNT_NOTES_RESOURCE,
                       AccountNotes.class, new QueryParams());
      }
docs: List an account's notes
  <p>
  Returns the account's notes
  
  @param accountCode recurly account id
  @return the notes associated with this account on success, null otherwise