c.l.w._.stepto(DecoratorAdvisor) : 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 uses Zope's class advisor stuff to make sure that the path segment
passed to `stepto` is handled by the decorated method.

That is::
  cls.__stepto_traversals__[argument] = decorated