syntax_data: {"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // Stop going up the backtrace once include! is encountered
context_before:             let expn_data = self.expn_data();
context_after:             if expn_data.kind == ExpnKind::Macro(MacroKind::Bang, sym::include) {