e.g.

<pre>
  class { 'foreman::install': } ~>
  class { 'foreman::config': } ~>
  Foreman::Plugin <| |> ~>
  class { 'foreman::database': } ~>
  class { 'foreman::service': } ->
  Class['foreman'] ->
  Foreman_smartproxy <| |>
</pre>