(command.ForEach
  iter_name: i
  iter_words: [
    (word.BracedTree
      parts: [
        <bcpc->
        (word_part.BracedTuple
          words: [{<bootstrap>} {<vm> (word_part.BracedRange kind:Id.Range_Int start:1 end:3 step:1)}]
        )
      ]
    )
  ]
  do_arg_iter: F
  body: 
    (command.DoGroup
      children: [
        (C {<VBoxManage>} {<controlvm>} {($ Id.VSub_DollarName '$i')} {<poweroff>})
        (C {<VBoxManage>} {<unregistervm>} {($ Id.VSub_DollarName '$i')} {<--delete>})
      ]
    )
  redirects: [(redir op:<Id.Redir_Great '2>'> loc:(redir_loc.Fd fd:2) arg:{<'/dev/null'>})]
)