{"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":"rustc_hir::CaptureBy::Ref"}]}
                rustc_hir::CaptureBy::Ref => fn_decl_span.shrink_to_lo(),
                rustc_hir::CaptureBy::Use { use_kw } => use_kw.shrink_to_lo(),
            };