$self->xml()->first_name();

##</code><code>##

use constant {
  STUFF => {
    'name1'     => 'first_name',
    'name2'     => 'last_name',
  },
};

foreach my $val (keys ${\( STUFF() ) } ){
  my $value = eval("$self->xml()->${\( STUFF() ) }->{ $val }()");
}

##</code><code>##

use constant {
  STUFF => {
    'name1'     => $self->xml()->first_name(),
    'name2'     => $self->xml()->last_name(),
  },
};