syntax_data: {"ast_node_type":"other","tokens":[{"end":54,"kind":"keyword","start":0,"text":"Span::new(self.lo,"}]}
source_snippet:         Span::new(self.lo, self.hi, self.ctxt, parent)
context_before:     fn with_parent(&self, parent: Option<LocalDefId>) -> Span {
context_after:     }