(command.CommandList
  children: [
    (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_GlobDEqual
                          left: {($ Id.VSub_Number 0)}
                          right: 
                            {
                              (BracedVarSub
                                left: <Id.Left_DollarBrace '${'>
                                token: <Id.VSub_Name BASH_SOURCE>
                                var_name: BASH_SOURCE
                                bracket_op: (bracket_op.ArrayIndex expr:{<Id.Lit_Digits 0>})
                                right: <Id.Right_DollarBrace '}'>
                              )
                            }
                        )
                      right: <Id.Lit_DRightBracket ']]'>
                      redirects: []
                    )
                  terminator: <Id.Op_Semi _>
                )
              ]
            )
          then_kw: <Id.KW_Then then>
          action: [
            (command.Simple
              blame_tok: <source>
              more_env: []
              words: [
                {<source>}
                {
                  (BracedVarSub
                    left: <Id.Left_DollarBrace '${'>
                    token: <Id.VSub_Name BASH_SOURCE>
                    var_name: BASH_SOURCE
                    bracket_op: (bracket_op.ArrayIndex expr:{<Id.Lit_Digits 0>})
                    suffix_op: 
                      (suffix_op.Unary
                        op: <Id.VOp1_Percent '%'>
                        arg_word: {<Id.Lit_Slash '/'> <Id.Lit_Other '*'>}
                      )
                    right: <Id.Right_DollarBrace '}'>
                  ) <'/../../lib/help.sh'>
                }
              ]
              redirects: []
              do_fork: T
            )
          ]
          spids: [58 77]
        )
      ]
      else_action: []
      fi_kw: <Id.KW_Fi fi>
      redirects: []
    )
    (command.Simple
      blame_tok: <_Dbg_help_add_sub>
      more_env: []
      words: [
        {<_Dbg_help_add_sub>}
        {<show>}
        {<commands>}
        {
          (SQ <'show commands [+NUM]\n'> <'\n'> <'Show the history of commands you typed.\n'> 
            <'You can supply a command number to start with, or a "+" to start after\n'> <'the previous command number shown.'>
          )
        }
        {<1>}
      ]
      redirects: []
      do_fork: T
    )
    (command.ShAssignment
      left: <Id.Lit_ArrayLhsOpen '_Dbg_show_nolist['>
      pairs: [
        (AssignPair
          left: <Id.Lit_ArrayLhsOpen '_Dbg_show_nolist['>
          lhs: 
            (sh_lhs_expr.IndexedName
              left: <Id.Lit_ArrayLhsOpen '_Dbg_show_nolist['>
              name: _Dbg_show_nolist
              index: ($ Id.Lit_ArithVarLike commands)
            )
          op: assign_op.Equal
          rhs: {<1>}
        )
      ]
      redirects: []
    )
    (command.ShFunction
      name_tok: <_Dbg_do_show_commands>
      name: _Dbg_do_show_commands
      body: 
        (BraceGroup
          left: <Id.Lit_LBrace '{'>
          children: [
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [{<typeset>} {<-i>} {<Id.Lit_VarLike 'default_hi_start='> <_Dbg_hi-1>}]
              redirects: []
              do_fork: T
            )
            (command.If
              if_kw: <Id.KW_If if>
              arms: [
                (IfArm
                  keyword: <Id.KW_If if>
                  cond: 
                    (condition.Shell
                      commands: [
                        (command.Sentence
                          child: 
                            (command.DParen
                              left: <Id.Op_DLeftParen _>
                              child: 
                                (arith_expr.Binary
                                  op_id: Id.Arith_Less
                                  left: ($ Id.Lit_ArithVarLike default_hi_start)
                                  right: {<Id.Lit_Digits 0>}
                                )
                              right: <Id.Op_DRightParen _>
                              redirects: []
                            )
                          terminator: <Id.Op_Semi _>
                        )
                      ]
                    )
                  then_kw: <Id.KW_Then then>
                  action: [
                    (command.Sentence
                      child: 
                        (command.ShAssignment
                          left: <Id.Lit_VarLike 'default_hi_start='>
                          pairs: [
                            (AssignPair
                              left: <Id.Lit_VarLike 'default_hi_start='>
                              lhs: 
                                (sh_lhs_expr.Name
                                  left: <Id.Lit_VarLike 'default_hi_start='>
                                  name: default_hi_start
                                )
                              op: assign_op.Equal
                              rhs: {<0>}
                            )
                          ]
                          redirects: []
                        )
                      terminator: <Id.Op_Semi _>
                    )
                  ]
                  spids: [138 151]
                )
              ]
              else_action: []
              fi_kw: <Id.KW_Fi fi>
              redirects: []
            )
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [
                {<typeset>}
                {<Id.Lit_VarLike 'hi_start='> 
                  (BracedVarSub
                    left: <Id.Left_DollarBrace '${'>
                    token: <Id.VSub_Number 2>
                    var_name: 2
                    suffix_op: 
                      (suffix_op.Unary
                        op: <Id.VTest_ColonHyphen _>
                        arg_word: {($ Id.VSub_DollarName default_hi_start)}
                      )
                    right: <Id.Right_DollarBrace '}'>
                  )
                }
              ]
              redirects: []
              do_fork: T
            )
            (command.Simple
              blame_tok: <eval>
              more_env: []
              words: [{<eval>} {(DQ ($ Id.VSub_DollarName _seteglob))}]
              redirects: []
              do_fork: T
            )
            (command.Case
              case_kw: <Id.KW_Case case>
              to_match: (case_arg.Word w:{($ Id.VSub_DollarName hi_start)})
              arms_start: <Id.KW_In in>
              arms: [
                (CaseArm
                  left: <Id.Left_DoubleQuote '"'>
                  pattern: (pat.Words words:[{(DQ <'+'>)}])
                  middle: <Id.Right_CasePat _>
                  action: [
                    (command.DParen
                      left: <Id.Op_DLeftParen _>
                      child: 
                        (arith_expr.BinaryAssign
                          op_id: Id.Arith_Equal
                          left: ($ Id.Lit_ArithVarLike hi_start)
                          right: 
                            (arith_expr.Binary
                              op_id: Id.Arith_Minus
                              left: ($ Id.Lit_ArithVarLike _Dbg_hi_last_stop)
                              right: {<Id.Lit_Digits 1>}
                            )
                        )
                      right: <Id.Op_DRightParen _>
                      redirects: []
                    )
                  ]
                  right: <Id.Op_DSemi _>
                )
                (CaseArm
                  left: <Id.VSub_DollarName '$int_pat'>
                  pattern: 
                    (pat.Words
                      words: [{($ Id.VSub_DollarName int_pat)} {<-> ($ Id.VSub_DollarName int_pat)}]
                    )
                  middle: <Id.Right_CasePat _>
                  action: [
                    (command.Simple
                      blame_tok: <Id.Lit_Colon ':'>
                      more_env: []
                      words: [{<Id.Lit_Colon ':'>}]
                      redirects: []
                      do_fork: T
                    )
                  ]
                  right: <Id.Op_DSemi _>
                )
                (CaseArm
                  left: <Id.Lit_Star '*'>
                  pattern: (pat.Words words:[{<Id.Lit_Star '*'>}])
                  middle: <Id.Right_CasePat _>
                  action: [
                    (command.Simple
                      blame_tok: <_Dbg_msg>
                      more_env: []
                      words: [
                        {<_Dbg_msg>}
                        {
                          (DQ <'Invalid parameter '> ($ Id.VSub_DollarName hi_start) 
                            <'. Need an integer or \'+\''>
                          )
                        }
                      ]
                      redirects: []
                      do_fork: T
                    )
                  ]
                )
              ]
              arms_end: <Id.KW_Esac esac>
              redirects: []
            )
            (command.Simple
              blame_tok: <eval>
              more_env: []
              words: [{<eval>} {(DQ ($ Id.VSub_DollarName _resteglob))}]
              redirects: []
              do_fork: T
            )
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [{<typeset>} {<-i>} {<Id.Lit_VarLike 'hi_stop='> <hi_start-10>}]
              redirects: []
              do_fork: T
            )
            (command.Simple
              blame_tok: <_Dbg_do_history_list>
              more_env: []
              words: [
                {<_Dbg_do_history_list>}
                {($ Id.VSub_DollarName hi_start)}
                {($ Id.VSub_DollarName hi_stop)}
              ]
              redirects: []
              do_fork: T
            )
            (command.ShAssignment
              left: <Id.Lit_VarLike '_Dbg_hi_last_stop='>
              pairs: [
                (AssignPair
                  left: <Id.Lit_VarLike '_Dbg_hi_last_stop='>
                  lhs: 
                    (sh_lhs_expr.Name
                      left: <Id.Lit_VarLike '_Dbg_hi_last_stop='>
                      name: _Dbg_hi_last_stop
                    )
                  op: assign_op.Equal
                  rhs: {($ Id.VSub_DollarName hi_stop)}
                )
              ]
              redirects: []
            )
          ]
          redirects: []
          right: <Id.Lit_RBrace '}'>
        )
    )
  ]
)