syntax_data: {"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"debug_assert!(data.parent"}]}
source_snippet:     debug_assert!(data.parent == ExpnId::root() || krate == data.parent.krate);
context_before: ) -> ExpnId {
context_after:     let expn_id = ExpnId { krate, local_id };