Ordered Containers
==================
Let's add an ordered container and place some objects in it:
>>> from zope.container.ordered import OrderedContainer
>>> c1 = OrderedContainer()
>>> c1['sub1'] = OrderedContainer()
>>> c1['sub2'] = OrderedContainer()
>>> c1['sub3'] = OrderedContainer()
>>> c1['sub4'] = OrderedContainer()
>>> c1.keys()
['sub1', 'sub2', 'sub3', 'sub4']
A special management view provides methods for moving objects down, up,
to the bottom, and to the top
>>> from cybertools.container.ordered import OrderedContainerView
>>> from zope.publisher.browser import TestRequest
>>> view = OrderedContainerView(c1, TestRequest())
>>> view.move_bottom(('sub3',))
>>> c1.keys()
['sub1', 'sub2', 'sub4', 'sub3']
>>> view.move_up(('sub4',), 1)
>>> c1.keys()
['sub1', 'sub4', 'sub2', 'sub3']
>>> view.move_top(('sub2',))
>>> c1.keys()
['sub2', 'sub1', 'sub4', 'sub3']
>>> view.move_down(('sub2',), 2)
>>> c1.keys()
['sub1', 'sub4', 'sub2', 'sub3']
