@meta.add_method(node.Node)<EOL>def to_yml(self):
pp = fmt.tab([])<EOL>to_yml_item(self, pp.lsdata, "<STR_LIT>")<EOL>return str(pp)<EOL>
Allow to get the YML string representation of a Node.::

    from pyrser.passes import to_yml

    t = Node()
    ...
    print(str(t.to_yml()))