{"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":"(ty::UpvarCapture::ByRef(ref_a),"}]}
        (ty::UpvarCapture::ByRef(ref_a), ty::UpvarCapture::ByRef(ref_b)) => ref_a == ref_b,
        (ty::UpvarCapture::ByUse, ty::UpvarCapture::ByUse) => true,
        (ty::UpvarCapture::ByValue, _)