(command.CommandList
  children: [
    (command.AndOr
      children: [
        (command.Simple
          blame_tok: <_userland>
          more_env: []
          words: [{<_userland>} {<GNU>}]
          redirects: []
          do_fork: T
        )
        (command.ControlFlow keyword:<Id.ControlFlow_Return return> arg_word:{<1>})
      ]
      ops: [<Id.Op_DPipe _>]
    )
    (command.AndOr
      children: [
        (command.ShFunction
          name_tok: <_ifupdown>
          name: _ifupdown
          body: 
            (BraceGroup
              left: <Id.Lit_LBrace '{'>
              children: [
                (command.Simple
                  blame_tok: <local>
                  more_env: []
                  words: [{<local>} {<cur>} {<prev>} {<words>} {<cword>}]
                  redirects: []
                  do_fork: T
                )
                (command.AndOr
                  children: [
                    (command.Simple
                      blame_tok: <_init_completion>
                      more_env: []
                      words: [{<_init_completion>}]
                      redirects: []
                      do_fork: T
                    )
                    (command.ControlFlow keyword:<Id.ControlFlow_Return return>)
                  ]
                  ops: [<Id.Op_DPipe _>]
                )
                (command.If
                  if_kw: <Id.KW_If if>
                  arms: [
                    (IfArm
                      keyword: <Id.KW_If if>
                      cond: 
                        (condition.Shell
                          commands: [
                            (command.Sentence
                              child: 
                                (command.DBracket
                                  left: <Id.KW_DLeftBracket '[['>
                                  expr: 
                                    (bool_expr.Binary
                                      op_id: Id.BoolBinary_eq
                                      left: {($ Id.VSub_DollarName cword)}
                                      right: {<1>}
                                    )
                                  right: <Id.Lit_DRightBracket ']]'>
                                  redirects: []
                                )
                              terminator: <Id.Op_Semi _>
                            )
                          ]
                        )
                      then_kw: <Id.KW_Then then>
                      action: [
                        (command.Simple
                          blame_tok: <_configured_interfaces>
                          more_env: []
                          words: [{<_configured_interfaces>}]
                          redirects: []
                          do_fork: T
                        )
                        (command.ShAssignment
                          left: <Id.Lit_VarLike 'COMPREPLY='>
                          pairs: [
                            (AssignPair
                              left: <Id.Lit_VarLike 'COMPREPLY='>
                              lhs: 
                                (sh_lhs_expr.Name
                                  left: <Id.Lit_VarLike 'COMPREPLY='>
                                  name: COMPREPLY
                                )
                              op: assign_op.Equal
                              rhs: 
                                {
                                  (ShArrayLiteral
                                    left: <Id.Op_LParen _>
                                    words: [
                                      {
                                        (CommandSub
                                          left_token: <Id.Left_DollarParen '$('>
                                          child: 
                                            (command.Simple
                                              blame_tok: <compgen>
                                              more_env: []
                                              words: [
                                                {<compgen>}
                                                {<-W>}
                                                {(SQ <'${COMPREPLY[@]}'>)}
                                                {<-->}
                                                {(DQ ($ Id.VSub_DollarName cur))}
                                              ]
                                              redirects: []
                                              do_fork: T
                                            )
                                          right: <Id.Eof_RParen _>
                                        )
                                      }
                                    ]
                                    right: <Id.Right_ShArrayLiteral _>
                                  )
                                }
                            )
                          ]
                          redirects: []
                        )
                      ]
                      spids: [41 54]
                    )
                  ]
                  else_action: []
                  fi_kw: <Id.KW_Fi fi>
                  redirects: []
                )
                (command.ControlFlow
                  keyword: <Id.ControlFlow_Return return>
                  arg_word: {<0>}
                )
              ]
              redirects: []
              right: <Id.Lit_RBrace '}'>
            )
        )
        (command.Simple
          blame_tok: <complete>
          more_env: []
          words: [{<complete>} {<-F>} {<_ifupdown>} {<ifup>} {<ifdown>} {<ifstatus>}]
          redirects: []
          do_fork: T
        )
      ]
      ops: [<Id.Op_DAmp _>]
    )
  ]
)