(command.CommandList
  children: [
    (command.Simple
      blame_tok: <_Dbg_help_add>
      more_env: []
      words: [
        {<_Dbg_help_add>}
        {<undisplay>}
        {
          (DQ <'**undisplay** *display-number*...\n'> <'\n'> 
            <
'Cancel some expressions to be displayed when program stops. Arguments are the code numbers\n'
            > <'of the expressions to stop displaying.\n'> <'\n'> <'Examples:\n'> <'---------\n'> <'\n'> 
            <'    undisplay 0     # Removes display statement 0\n'> <'    undisplay 0 3 4 # Removes display statements 0, 3, and 4\n'> <'\n'> <'See also:\n'> 
            <'---------\n'> <'\n'> <'*display* and *info display*.'>
          )
        }
      ]
      redirects: []
      do_fork: T
    )
    (command.ShFunction
      name_tok: <_Dbg_do_undisplay>
      name: _Dbg_do_undisplay
      body: 
        (BraceGroup
          left: <Id.Lit_LBrace '{'>
          children: [
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [{<typeset>} {<-i>} {<del>}]
              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_DEqual
                                  left: {<Id.Lit_Digits 0>}
                                  right: {($ Id.VSub_Pound '#')}
                                )
                              right: <Id.Op_DRightParen _>
                              redirects: []
                            )
                          terminator: <Id.Op_Semi _>
                        )
                      ]
                    )
                  then_kw: <Id.KW_Then then>
                  action: [
                    (command.Simple
                      blame_tok: <_Dbg_errmsg>
                      more_env: []
                      words: [{<_Dbg_errmsg>} {(SQ <'You need to pass in some display numbers.'>)}]
                      redirects: []
                      do_fork: T
                    )
                    (command.ControlFlow
                      keyword: <Id.ControlFlow_Return return>
                      arg_word: {<0>}
                    )
                  ]
                  spids: [100 115]
                )
              ]
              else_action: []
              fi_kw: <Id.KW_Fi fi>
              redirects: []
            )
            (command.ForEach
              keyword: <Id.KW_For for>
              iter_names: [del]
              iterable: (for_iter.Words words:[{($ Id.VSub_At '@')}])
              semi_tok: <Id.Op_Semi _>
              body: 
                (command.DoGroup
                  left: <Id.KW_Do do>
                  children: [
                    (command.If
                      if_kw: <Id.KW_If if>
                      arms: [
                        (IfArm
                          keyword: <Id.KW_If if>
                          cond: 
                            (condition.Shell
                              commands: [
                                (command.Sentence
                                  child: 
                                    (command.Simple
                                      blame_tok: <Id.Lit_LBracket '['>
                                      more_env: []
                                      words: [
                                        {<Id.Lit_LBracket '['>}
                                        {<-n>}
                                        {
                                          (DQ 
                                            (BracedVarSub
                                              left: <Id.Left_DollarBrace '${'>
                                              token: <Id.VSub_Name _Dbg_disp_exp>
                                              var_name: _Dbg_disp_exp
                                              bracket_op: 
                                                (bracket_op.ArrayIndex
                                                  expr: {($ Id.VSub_DollarName del)}
                                                )
                                              right: <Id.Right_DollarBrace '}'>
                                            )
                                          )
                                        }
                                        {<Id.Lit_RBracket ']'>}
                                      ]
                                      redirects: []
                                      do_fork: T
                                    )
                                  terminator: <Id.Op_Semi _>
                                )
                              ]
                            )
                          then_kw: <Id.KW_Then then>
                          action: [
                            (command.Simple
                              blame_tok: <_Dbg_write_journal_eval>
                              more_env: []
                              words: [
                                {<_Dbg_write_journal_eval>}
                                {(DQ <'unset _Dbg_disp_exp['> ($ Id.VSub_DollarName del) <']'>)}
                              ]
                              redirects: []
                              do_fork: T
                            )
                            (command.Simple
                              blame_tok: <_Dbg_write_journal_eval>
                              more_env: []
                              words: [
                                {<_Dbg_write_journal_eval>}
                                {(DQ <'unset _Dbg_disp_enable['> ($ Id.VSub_DollarName del) <']'>)}
                              ]
                              redirects: []
                              do_fork: T
                            )
                            (command.Simple
                              blame_tok: <_Dbg_msg>
                              more_env: []
                              words: [
                                {<_Dbg_msg>}
                                {(DQ <'Display entry '> ($ Id.VSub_DollarName del) <' unset.'>)}
                              ]
                              redirects: []
                              do_fork: T
                            )
                          ]
                          spids: [147 166]
                        )
                      ]
                      else_kw: <Id.KW_Else else>
                      else_action: [
                        (command.Simple
                          blame_tok: <_Dbg_msg>
                          more_env: []
                          words: [
                            {<_Dbg_msg>}
                            {
                              (DQ <'Display entry '> ($ Id.VSub_DollarName del) 
                                <' doesn\'t exist, so nothing done.'>
                              )
                            }
                          ]
                          redirects: []
                          do_fork: T
                        )
                      ]
                      fi_kw: <Id.KW_Fi fi>
                      redirects: []
                    )
                  ]
                  right: <Id.KW_Done done>
                )
              redirects: []
            )
            (command.ControlFlow keyword:<Id.ControlFlow_Return return> arg_word:{<0>})
          ]
          redirects: []
          right: <Id.Lit_RBrace '}'>
        )
    )
  ]
)