(CommandList
  children: [
    (If
      arms: [
        (if_arm
          cond: [
            (Sentence
              child: 
                (C {(Lit_Other "[")} {(DQ ($ VSub_Pound "$#"))} {(-lt)} {(DQ (2))} {(Lit_Other "]")})
              terminator: <Op_Semi ";">
            )
          ]
          action: [
            (SimpleCommand
              words: [
                {(echo)}
                {
                  (DQ ("Usage:   ") 
                    (CommandSubPart
                      command_list: (CommandList children:[(C {(basename)} {($ VSub_Number "$0")})])
                      left_token: <Left_Backtick "`">
                      spids: [105 109]
                    ) (" timeout_in_seconds command")
                  )
                }
              ]
              redirects: [(Redir op_id:Redir_GreatAnd fd:-1 arg_word:{(2)} spids:[113])]
            )
            (SimpleCommand
              words: [
                {(echo)}
                {
                  (DQ ("Example: ") 
                    (CommandSubPart
                      command_list: (CommandList children:[(C {(basename)} {($ VSub_Number "$0")})])
                      left_token: <Left_Backtick "`">
                      spids: [121 125]
                    ) (" 2 sleep 3 || echo timeout")
                  )
                }
              ]
              redirects: [(Redir op_id:Redir_GreatAnd fd:-1 arg_word:{(2)} spids:[129])]
            )
            (C {(exit)} {(1)})
          ]
          spids: [-1 98]
        )
      ]
      spids: [-1 137]
    )
    (FuncDef
      name: cleanup
      body: 
        (BraceGroup
          children: [
            (C {(trap)} {(-)} {(ALRM)})
            (SimpleCommand
              words: [{(kill)} {(-ALRM)} {($ VSub_Name "$a")}]
              redirects: [(Redir op_id:Redir_Great fd:2 arg_word:{(/dev/null)} spids:[163])]
            )
            (AndOr
              children: [
                (SimpleCommand
                  words: [{(kill)} {($ VSub_Bang "$!")}]
                  redirects: [(Redir op_id:Redir_Great fd:2 arg_word:{(/dev/null)} spids:[174])]
                )
                (C {(exit)} {(124)})
              ]
              op_id: Op_DAmp
            )
          ]
          spids: [144]
        )
      spids: [140 143]
    )
    (FuncDef
      name: watchit
      body: 
        (BraceGroup
          children: [
            (C {(trap)} {(DQ (cleanup))} {(ALRM)})
            (Sentence child:(C {(sleep)} {($ VSub_Number "$1")}) terminator:<Op_Amp "&">)
            (C {(wait)})
            (C {(kill)} {(-ALRM)} {($ VSub_Dollar "$$")})
          ]
          spids: [197]
        )
      spids: [193 196]
    )
    (Sentence child:(C {(watchit)} {($ VSub_Number "$1")}) terminator:<Op_Amp "&">)
    (Assignment
      keyword: Assign_None
      pairs: [(assign_pair lhs:(LhsName name:a) op:Equal rhs:{($ VSub_Bang "$!")} spids:[231])]
      spids: [231]
    )
    (C {(shift)})
    (C {(trap)} {(DQ (cleanup))} {(ALRM)} {(INT)})
    (Sentence child:(C {(DQ ($ VSub_At "$@"))}) terminator:<Op_Amp "&">)
    (Sentence child:(C {(wait)} {($ VSub_Bang "$!")}) terminator:<Op_Semi ";">)
    (Assignment
      keyword: Assign_None
      pairs: [(assign_pair lhs:(LhsName name:RET) op:Equal rhs:{($ VSub_QMark "$?")} spids:[265])]
      spids: [265]
    )
    (C {(kill)} {(-ALRM)} {($ VSub_Name "$a")})
    (C {(wait)} {($ VSub_Name "$a")})
    (C {(exit)} {($ VSub_Name "$RET")})
  ]
)