code: public Client createWithEmailAndDescription( String email, String description ) {
      ParameterMap<String, String> params = new ParameterMap<String, String>();
      if( StringUtils.isNotBlank( email ) )
        params.add( "email", email );
      if( StringUtils.isNotBlank( description ) )
        params.add( "description", description );
  
      return RestfulUtils.create( ClientService.PATH, params, Client.class, super.httpClient );
    }
docs: Creates a {@link Client} object.
  @param email
  Mail address for the {@link Client} or <code>null</code>
  @param description
  Description for the client or <code>null</code>
  @return {@link Client} object, which represents a PAYMILL client.