use v5.14;

package Person {
  use Moose;
  has first_name => (is => 'rw', isa => 'Str');
  has last_name  => (is => 'rw', isa => 'Str');

  sub set_name {
    my $self = shift;
    my ($first, $last) = @_;
    $self->first_name($first);
    $self->last_name($last);
  }
}

package LoudNameChanges {
  use Moose::Role;
  around set_name => sub {
    my $orig = shift;
    my $self = shift;
    say "Changing name to: @_";
    $self->$orig(@_);
  };
}

package Person::LoudNameChanges {
  use Moose;
  extends 'Person'; with 'LoudNameChanges';
}

my $bob = Person::LoudNameChanges->new(
  first_name => 'Robert',
  last_name  => 'Smith',
);

$bob->set_name('David', 'Jones');

print $bob->dump;