(command.CommandList
  children: [
    (command.Simple
      blame_tok: <_Dbg_help_add>
      more_env: []
      words: [{<_Dbg_help_add>} {<pwd>} {(SQ <'**pwd**\n'> <'\n'> <'Show working directory.'>)}]
      redirects: []
      do_fork: T
    )
    (command.ShFunction
      name_tok: <_Dbg_do_pwd>
      name: _Dbg_do_pwd
      body: 
        (BraceGroup
          left: <Id.Lit_LBrace '{'>
          children: [
            (command.Sentence
              child: 
                (command.Simple
                  blame_tok: <typeset>
                  more_env: []
                  words: [{<typeset>} {<_Dbg_cwd>}]
                  redirects: []
                  do_fork: T
                )
              terminator: <Id.Op_Semi _>
            )
            (command.ShAssignment
              left: <Id.Lit_VarLike '_Dbg_cwd='>
              pairs: [
                (AssignPair
                  left: <Id.Lit_VarLike '_Dbg_cwd='>
                  lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike '_Dbg_cwd='> name:_Dbg_cwd)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (CommandSub
                        left_token: <Id.Left_DollarParen '$('>
                        child: 
                          (command.Simple
                            blame_tok: <pwd>
                            more_env: []
                            words: [{<pwd>}]
                            redirects: []
                            do_fork: T
                          )
                        right: <Id.Eof_RParen _>
                      )
                    }
                )
              ]
              redirects: []
            )
            (command.AndOr
              children: [
                (command.DParen
                  left: <Id.Op_DLeftParen _>
                  child: ($ Id.Lit_ArithVarLike _Dbg_set_basename)
                  right: <Id.Op_DRightParen _>
                  redirects: []
                )
                (command.ShAssignment
                  left: <Id.Lit_VarLike '_Dbg_cwd='>
                  pairs: [
                    (AssignPair
                      left: <Id.Lit_VarLike '_Dbg_cwd='>
                      lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike '_Dbg_cwd='> name:_Dbg_cwd)
                      op: assign_op.Equal
                      rhs: 
                        {
                          (BracedVarSub
                            left: <Id.Left_DollarBrace '${'>
                            token: <Id.VSub_Name _Dbg_cwd>
                            var_name: _Dbg_cwd
                            suffix_op: 
                              (suffix_op.Unary
                                op: <Id.VOp1_DPound '##'>
                                arg_word: {<Id.Lit_Other '*'> <Id.Lit_Slash '/'>}
                              )
                            right: <Id.Right_DollarBrace '}'>
                          )
                        }
                    )
                  ]
                  redirects: []
                )
              ]
              ops: [<Id.Op_DAmp _>]
            )
            (command.Simple
              blame_tok: <_Dbg_msg>
              more_env: []
              words: [{<_Dbg_msg>} {(DQ <'Working directory '> (${ Id.VSub_Name _Dbg_cwd) <.>)}]
              redirects: []
              do_fork: T
            )
          ]
          redirects: []
          right: <Id.Lit_RBrace '}'>
        )
    )
  ]
)