syntax_data: {"ast_node_type":"other","tokens":[{"end":38,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // Generate crate_::{{expn_}}.
context_before:     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
context_after:         write!(f, "{:?}::{{{{expn{}}}}}", self.krate, self.local_id.as_u32())