Spechal

class varnish (
    $base_dir = '/etc/varnish/',
    $vcl_file = 'default.vcl',
    $backends_file = 'default',
    $vcl_template = 'default',
    $storage = 'malloc',
    $storage_size = '1G',
    $thread_pools = 2,
    $thread_pool_min = 2000,
    $thread_pool_max = 4000,

Spechal

class test ($opts = {default => 'value'}){
  file { 'some/file': 
    content => template('test/file')
  }
}

node test {
  class { 'test': 
    opts => { some => 'thing' }
  }