(CommandList
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          spids: [6 10]
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        (CommandSubPart
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          left_token: <Left_CommandSub '$('>
          spids: [15 19]
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          children: [
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              ops: [Op_DAmp Op_DPipe]
              children: [
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                  pairs: [
                    (assign_pair
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                      op: Equal
                      rhs: {(DQ (${ VSub_Number 1))}
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          children: [
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              pairs: [
                (assign_pair
                  lhs: (LhsName name:ast)
                  op: Equal
                  rhs: {(DQ (${ VSub_Number 1))}
                  spids: [82]
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              pairs: [
                (assign_pair
                  lhs: (LhsName name:env)
                  op: Equal
                  rhs: {(DQ (${ VSub_Number 2))}
                  spids: [92]
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              keyword: Assign_None
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              spids: [100]
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              children: [
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              pairs: [
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                  op: Equal
                  rhs: {(DQ (${ VSub_Name ast))}
                  spids: [120]
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              spids: [120]
            )
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        )
      spids: [72 76]
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    (FuncDef
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                      terminator: <Op_Semi ';'>
                    )
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                  action: [
                    (C {(_pr_str)} {(DQ (${ VSub_Name __ERROR))} {(yes)})
                    (Assignment
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                      pairs: [
                        (assign_pair
                          lhs: (LhsName name:r)
                          op: Equal
                          rhs: {(DQ ('Error: ') (${ VSub_Name r))}
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                      spids: [168]
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                    (Assignment
                      keyword: Assign_None
                      pairs: [
                        (assign_pair
                          lhs: (LhsName name:__ERROR)
                          op: Equal
                          rhs: {(EmptyPart)}
                          spids: [177]
                        )
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                      spids: [177]
                    )
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                  spids: [16777215 154]
                )
              ]
              else_action: [(C {(_pr_str)} {(DQ (${ VSub_Number 1))} {(yes)})]
              spids: [180 194]
            )
          ]
          spids: [138]
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    )
    (FuncDef
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        (BraceGroup
          children: [
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            (C {(EVAL)} {(DQ (${ VSub_Name r))})
            (C {(PRINT)} {(DQ (${ VSub_Name r))})
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      body: 
        (DoGroup
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                (ControlFlow
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            )
            (AndOr
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              children: [
                (DBracket expr:(WordTest w:{(DQ (${ VSub_Name r))}))
                (C {(REP)} {(DQ (${ VSub_Name r))})
                (C {(echo)} {(DQ (${ VSub_Name r))})
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            )
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          spids: [247 295]
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)