'Build a list of contained items for the given item class
Returns a tuple `(root, items)` for the specified item class, where:
root: True if this class accepts a "naked" specification without an
item seletion (e.g. "layout" defaults to current layout), and False
if it does not (e.g. no default "widget").
items: a list of contained items'

def items(self, name):

    ret = self._items(name)
    if (ret is None):
        return (False, [])
    return ret
