syntax_data: {"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"write!(f,"}]}
source_snippet:         write!(f, "{:?}::{{{{expn{}}}}}", self.krate, self.local_id.as_u32())
context_before:         // Generate crate_::{{expn_}}.
context_after:     }