{"ast_node_type":"other","tokens":[{"end":100,"kind":"keyword","start":0,"text":"is_assign_desugar:"}]}
                is_assign_desugar: matches!(local.source, rustc_hir::LocalSource::AssignDesugar(_)),
                    .map(|init| (local.span.until(init.span), init.span.shrink_to_hi())),
            };