{"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":"arms:"}]}
    arms: &[MatchArm<'p, RustcPatCtxt<'p, 'tcx>>],
    rcx: &RustcPatCtxt<'p, 'tcx>,
    pat_column: &PatternColumn<'p, RustcPatCtxt<'p, 'tcx>>,