Mojo Routes Question

#I clearly still don't quite get how to set up hierarchical routes. I've tried this:
  my $route = $r->route('/foo')->to('controller' => 'example');
      my $foo_route =  $route->get->to(action => 'foo');
      my $bar_route = $route->post->to(action => 'bar');
# This one works fine. Creates routes:
# /foo *
#   +/ GET
#   +/ POST

#But then, if I try to tack on a subroute:
      $bar_route->get('/baz')->to(action => 'bas');
#then I tried to get fancy and chain my routes together like this:
  my $route = $r->route('/foo')->to('controller' => 'example')
      ->get->to(action => 'foo');
      ->post->to(action => 'bar');

# This does not work. It creates these routes:
# /foo *
#   +/ GET
#   +/ GET
#     +/baz GET
#
# And they don't work. GET to /foo is functional, but POST to /foo now fails, and GET to /foo/baz doesn't work.
#
# What gives? The initial stab of routing two methods to a single path worked, but doesn't allow me to
# chain anything on.

# This version works flawlessly:
$r->get('/foo')->to('example#foo');
$r->post('/foo')->to('example#bar');
$r->get('/foo/baz')->to('example#baz');

# But it's no good because of the redundant code - '/foo' is repeated in all 3 routes (2 of which have
# identical paths!), and the controller is repeated across all three of them. I could resolve that by stuffing
# the hardwired strings into variables, but before I do that I'm trying to see if I can get it going with just the
# method calls. If it can't be done, then c'est le vie