syntax_data: {"ast_node_type":"other","tokens":[{"end":44,"kind":"keyword","start":0,"text":"ensure_sufficient_stack(||"}]}
source_snippet:                 ensure_sufficient_stack(|| {
context_before:                 let region_scope = (region_scope, source_info);
context_after:                     this.in_scope(region_scope, lint_level, |this| {