(command.CommandList
  children: [
    (command.Simple
      blame_tok: <_Dbg_help_add_sub>
      more_env: []
      words: [
        {<_Dbg_help_add_sub>}
        {<show>}
        {<basename>}
        {
          (SQ <'show basename\n'> <'\n'> <'Show whether use short filenames\n'> <'\n'> 
            <'See also \\"set basename\\".'>
          )
        }
        {<1>}
      ]
      redirects: []
      do_fork: T
    )
    (command.ShFunction
      name_tok: <_Dbg_do_show_basename>
      name: _Dbg_do_show_basename
      body: 
        (BraceGroup
          left: <Id.Lit_LBrace '{'>
          children: [
            (command.AndOr
              children: [
                (command.DBracket
                  left: <Id.KW_DLeftBracket '[['>
                  expr: (bool_expr.Unary op_id:Id.BoolUnary_n child:{($ Id.VSub_Number 1)})
                  right: <Id.Lit_DRightBracket ']]'>
                  redirects: []
                )
                (command.ShAssignment
                  left: <Id.Lit_VarLike 'label='>
                  pairs: [
                    (AssignPair
                      left: <Id.Lit_VarLike 'label='>
                      lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'label='> name:label)
                      op: assign_op.Equal
                      rhs: 
                        {
                          (CommandSub
                            left_token: <Id.Left_DollarParen '$('>
                            child: 
                              (command.Simple
                                blame_tok: <_Dbg_printf_nocr>
                                more_env: []
                                words: [{<_Dbg_printf_nocr>} {(DQ <'%-12s: '>)} {<basename>}]
                                redirects: []
                                do_fork: T
                              )
                            right: <Id.Eof_RParen _>
                          )
                        }
                    )
                  ]
                  redirects: []
                )
              ]
              ops: [<Id.Op_DAmp _>]
            )
            (command.Simple
              blame_tok: <_Dbg_msg>
              more_env: []
              words: [
                {<_Dbg_msg>}
                {
                  (DQ (${ Id.VSub_Name label) 
                    <'Show short filenames (the basename) in debug output is'>
                  )
                }
                {
                  (CommandSub
                    left_token: <Id.Left_DollarParen '$('>
                    child: 
                      (command.Simple
                        blame_tok: <_Dbg_onoff>
                        more_env: []
                        words: [{<_Dbg_onoff>} {($ Id.VSub_DollarName _Dbg_set_basename)}]
                        redirects: []
                        do_fork: T
                      )
                    right: <Id.Eof_RParen _>
                  )
                }
              ]
              redirects: []
              do_fork: T
            )
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [{<typeset>} {<Id.Lit_VarLike 'onoff='> (DQ <on.>)}]
              redirects: []
              do_fork: T
            )
            (command.AndOr
              children: [
                (command.DBracket
                  left: <Id.KW_DLeftBracket '[['>
                  expr: 
                    (bool_expr.Unary
                      op_id: Id.BoolUnary_z
                      child: 
                        {
                          (BracedVarSub
                            left: <Id.Left_DollarBrace '${'>
                            token: <Id.VSub_Name _Dbg_cmdloop_hooks>
                            var_name: _Dbg_cmdloop_hooks
                            bracket_op: (bracket_op.ArrayIndex expr:{(DQ <list>)})
                            right: <Id.Right_DollarBrace '}'>
                          )
                        }
                    )
                  right: <Id.Lit_DRightBracket ']]'>
                  redirects: []
                )
                (command.ShAssignment
                  left: <Id.Lit_VarLike 'onoff='>
                  pairs: [
                    (AssignPair
                      left: <Id.Lit_VarLike 'onoff='>
                      lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'onoff='> name:onoff)
                      op: assign_op.Equal
                      rhs: {(SQ <off.>)}
                    )
                  ]
                  redirects: []
                )
              ]
              ops: [<Id.Op_DAmp _>]
            )
            (command.ControlFlow keyword:<Id.ControlFlow_Return return> arg_word:{<0>})
          ]
          redirects: []
          right: <Id.Lit_RBrace '}'>
        )
    )
  ]
)