new_contents: HANDLERS = dict()
  
  
  def _rohrpost_handler(func, name):
      def ret_func(*args, **kwargs):
          return func(*args, **kwargs)
  
      def update_registry(key, value):
          if key in HANDLERS:
              raise Exception('Handler for "{}" is already defined.'.format(key))
          HANDLERS[key] = value
  
      name = name or func.__name__
  
      if isinstance(name, list):
          for n in name:
              update_registry(n, func)
      else:
          update_registry(name, func)
      return ret_func
  
  
  def rohrpost_handler(name=''):
      def wrap(f):
          return _rohrpost_handler(f, name)
      return wrap
  
subject: Add the rohrpost registry