code: public String getAccountAttribute(String name) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException  {
          if (info == null) {
              getRegistrationInfo();
          }
          return info.getAttributes().get(name);
      }
docs: Returns the value of a given account attribute or <tt>null</tt> if the account
  attribute wasn't found.
  
  @param name the name of the account attribute to return its value.
  @return the value of the account attribute or <tt>null</tt> if an account
  attribute wasn't found for the requested name.
  @throws XMPPErrorException
  @throws NoResponseException
  @throws NotConnectedException
  @throws InterruptedException