(CommandList
  children: [
    (Subshell
      child: (C {(printf)} {(SQ <"Bazel does not yet support objc protos.\\n">)})
      redirects: [(Redir op_id:Redir_GreatAnd fd:-1 arg_word:{(2)} spids:[54])]
      spids: [43 52]
    )
    (C {(exit)} {(1)})
  ]
)