sub setup {
  my $self = shift;
  for my $table in (@tables) { # define @tables elsewhere
    $self->run_modes(
      "c_$table" => sub { $self->do_c($table); },
      "r_$table" => sub { $self->do_r($table); },
      "u_$table" => sub { $self->do_u($table); },
      "d_$table" => sub { $self->do_d($table); },
    );
  }
}