has 'status' => (
   is => 'rw',
   isa => 'Status|Undef',
   handles => {
      success => sub { ( $_[0]->status() // '' ) eq 'success' },
      error   => sub { ( $_[0]->status() // '' ) eq 'error'   },
      pending => sub { ( $_[0]->status() // '' ) eq 'pending' },
   },
);