(command.CommandList
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    (command.If
      arms: [
        (if_arm
          cond: [
            (command.Sentence
              child: 
                (command.DBracket
                  expr: 
                    (bool_expr.Binary
                      op_id: Id.BoolBinary_GlobDEqual
                      left: {($ Id.VSub_Number '$0')}
                      right: 
                        {
                          (braced_var_sub
                            token: (Token id:Id.VSub_Name val:BASH_SOURCE span_id:70)
                            bracket_op: 
                              (bracket_op.ArrayIndex
                                expr: (arith_expr.ArithWord w:{(Id.Lit_Digits 0)})
                              )
                          )
                        }
                    )
                )
              terminator: (Token id:Id.Op_Semi val:';' span_id:78)
            )
          ]
          action: [
            (C {(source)} {(../init/require.sh)})
            (C {(source)} {(../lib/help.sh)})
            (C {(require)} {(../lib/alias.sh)})
          ]
          spids: [61 80]
        )
      ]
    )
    (C {(_Dbg_help_add)} {(enable)} 
      {
        (SQ (Token id:Id.Lit_Chars val:'**enable** *bpnum1* [*bpnum2* ...]\n' span_id:110) 
          (Token id:Id.Lit_Chars val:'\n' span_id:111) 
          (Token
            id: Id.Lit_Chars
            val: 
'Enables breakpoints *bpnum1*, *bpnum2*... Breakpoints numbers are given as a space-\n'
            span_id: 112
          ) (Token id:Id.Lit_Chars val:'separated list numbers.\n' span_id:113) 
          (Token id:Id.Lit_Chars val:'\n' span_id:114) (Token id:Id.Lit_Chars val:'See also:\n' span_id:115) 
          (Token id:Id.Lit_Chars val:'---------\n' span_id:116) (Token id:Id.Lit_Chars val:'\n' span_id:117) 
          (Token id:Id.Lit_Chars val:'**disable** and **info break**.' span_id:118)
        )
      }
    )
    (command.ShFunction
      name: _Dbg_do_enable
      body: 
        (command.BraceGroup
          children: [
            (command.If
              arms: [
                (if_arm
                  cond: [
                    (command.Sentence
                      child: 
                        (command.DParen
                          child: 
                            (arith_expr.Binary
                              op_id: Id.Arith_DEqual
                              left: (arith_expr.ArithWord w:{($ Id.VSub_Pound '$#')})
                              right: (arith_expr.ArithWord w:{(Id.Lit_Digits 0)})
                            )
                        )
                      terminator: (Token id:Id.Op_Semi val:';' span_id:143)
                    )
                  ]
                  action: [
                    (C {(_Dbg_errmsg)} 
                      {
                        (SQ 
                          (Token
                            id: Id.Lit_Chars
                            val: 'Expecting breakpoint/watchpoint numbers. Got none.'
                            span_id: 151
                          )
                        )
                      }
                    )
                    (command.ControlFlow
                      token: (Token id:Id.ControlFlow_Return val:return span_id:155)
                      arg_word: {(1)}
                    )
                  ]
                  spids: [132 145]
                )
              ]
            )
            (C {(_Dbg_enable_disable)} {(1)} {(SQ (Token id:Id.Lit_Chars val:enabled span_id:168))} 
              {($ Id.VSub_At '$@')}
            )
            (command.ControlFlow
              token: (Token id:Id.ControlFlow_Return val:return span_id:174)
              arg_word: {($ Id.VSub_QMark '$?')}
            )
          ]
        )
    )
    (command.If
      arms: [
        (if_arm
          cond: [
            (command.Sentence
              child: 
                (command.DBracket
                  expr: 
                    (bool_expr.Binary
                      op_id: Id.BoolBinary_GlobDEqual
                      left: {($ Id.VSub_Number '$0')}
                      right: 
                        {
                          (braced_var_sub
                            token: (Token id:Id.VSub_Name val:BASH_SOURCE span_id:190)
                            bracket_op: 
                              (bracket_op.ArrayIndex
                                expr: (arith_expr.ArithWord w:{(Id.Lit_Digits 0)})
                              )
                          )
                        }
                    )
                )
              terminator: (Token id:Id.Op_Semi val:';' span_id:198)
            )
          ]
          action: [
            (C {(require)} {(./help.sh)} {(../lib/msg.sh)} {(../lib/sort.sh)} {(../lib/columnize.sh)} 
              {(../lib/list.sh)}
            )
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:_Dbg_args)
                  op: assign_op.Equal
                  rhs: {(SQ (Token id:Id.Lit_Chars val:enable span_id:220))}
                  spids: [218]
                )
              ]
            )
            (C {(_Dbg_do_help)} {(enable)})
          ]
          spids: [181 200]
        )
      ]
    )
  ]
)