syntax_data: {"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"PotentialSiblings::Unfiltered(ref"}]}
source_snippet:             PotentialSiblings::Unfiltered(ref mut iter) => iter.next(),
context_before:         match *self {
context_after:             PotentialSiblings::Filtered(ref mut iter) => iter.next(),