{"ast_node_type":"variable","tokens":[{"end":84,"kind":"keyword","start":0,"text":"let"}]}
    let Some(precise_capturing_args) = bounds.iter().find_map(|bound| match *bound {
    let hir::OpaqueTy { bounds, .. } = *tcx.hir_node_by_def_id(opaque_def_id).expect_opaque_ty();
        hir::GenericBound::Use(bounds, ..) => Some(bounds),