syntax_data: {"ast_node_type":"variable","tokens":[{"end":69,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:     if let Some(attr) = tcx.get_attr(def_id, sym::must_not_suspend) {
context_before: ) -> bool {
context_after:         let reason = attr.value_str().map(|s| errors::MustNotSuspendReason {