l.s.w._.stepto(DecoratorAnnotator) : class documentation

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Add the decorated method to stepto traversals for a class.

A stepto method must take no arguments and return an object for the URL at
that point.

  @stepto('+foo')
  def traverse_foo(self):
      return getUtility(IFoo)

which looks up an object for '+foo', allowing a URL traversal that looks
like:

  launchpad.net/.../+foo

See also doc/navigation.txt.

This sets an attribute on the decorated function, equivalent to:

  if decorated.__stepto_traversals__ is None:
      decorated.__stepto_traversals__ = []
  decorated.__stepto_traversals__.append(argument)