(CommandList
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          body: 
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                  pairs: [
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                    (assign_pair lhs:(LhsName name:prev) op:Equal spids:[15])
                    (assign_pair lhs:(LhsName name:words) op:Equal spids:[17])
                    (assign_pair lhs:(LhsName name:cword) op:Equal spids:[19])
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                  spids: [11]
                )
                (AndOr
                  children: [(C {(_init_completion)}) (ControlFlow token:<ControlFlow_Return return>)]
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                (Case
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                        bracket_op: (WholeArray op_id:Lit_At)
                        spids: [32 37]
                      )
                    }
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                      action: [
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                          pairs: [
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                              op: Equal
                              rhs: 
                                {
                                  (ArrayLiteralPart
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                                      {
                                        (CommandSubPart
                                          command_list: 
                                            (CommandList
                                              children: [
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                                                )
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                                          left_token: <Left_CommandSub "$(">
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                      action: [
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                              op: Equal
                              rhs: 
                                {
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                                    words: [
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                                        (DQ 
                                          (CommandSubPart
                                            command_list: 
                                              (CommandList
                                                children: [
                                                  (Pipeline
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                                                      (SimpleCommand
                                                        words: [
                                                          {(alias)}
                                                          {
                                                            (BracedVarSub
                                                              token: <VSub_Name cur>
                                                              suffix_op: 
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                                                                  arg_word: {("=")}
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                                                              spids: [88 92]
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                                                        redirects: [
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                                                            fd: 2
                                                            arg_word: {(/dev/null)}
                                                            spids: [94]
                                                          )
                                                        ]
                                                      )
                                                      (C {(sed)} {(-e)} 
                                                        {(SQ <"s|^alias ">) (DQ ($ VSub_Name "$cur")) 
                                                          (SQ <"\\(.*\\)$|\\1|">)
                                                        }
                                                      )
                                                    ]
                                                    negated: False
                                                  )
                                                ]
                                              )
                                            left_token: <Left_CommandSub "$(">
                                            spids: [84 115]
                                          )
                                        )
                                      }
                                    ]
                                  )
                                }
                              spids: [80]
                            )
                          ]
                          spids: [80]
                        )
                      ]
                      spids: [75 77 121 -1]
                    )
                  ]
                  spids: [30 39 124]
                )
              ]
              spids: [8]
            )
          spids: [4 7]
        )
        (C {(complete)} {(-F)} {(_alias)} {(-o)} {(nospace)} {(alias)})
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      op_id: Op_DAmp
    )
  ]
)