'Create a new result set iterator for a given stanza query.
Arguments:
stanza    -- A stanza object to serve as a template for
queries made each iteration. For example, a
basic disco#items query.
interface -- The name of the substanza to which the
result set management stanza should be
appended. For example, for disco#items queries
the interface \'disco_items\' should be used.
results   -- The name of the interface containing the
query results (typically just \'substanzas\').'

def iterate(self, stanza, interface, results='substanzas'):

    return ResultIterator(stanza, interface, results)
