syntax_data: {"ast_node_type":"other","tokens":[{"end":89,"kind":"keyword","start":0,"text":".unwrap_or_else(||"}]}
source_snippet:                 .unwrap_or_else(|| span_bug!(span, "no enclosing breakable scope found"))
context_before:                 .rposition(|breakable_scope| breakable_scope.region_scope == scope)
context_after:         };