syntax_data: {"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:         if self.start == Self::UNINIT && self.end == Self::UNINIT + 1 {
context_before:     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
context_after:             write!(f, "uninit")