(CommandList
  children: [
    (C {(_Dbg_help_add_sub)} {(set)} {(basename)} 
      {
        (SQ <"**set basename** [**on**|**off**]\n"> <"\n"> <"\n"> 
          <"Set short filenames (the basename) in debug output\n"> <"\n"> <"See also:\n"> <"---------\n"> <"\n"> <"**show basename**\n">
        )
      }
    )
    (C {(_Dbg_next_complete) (Lit_Other "[") (set)} 
      {(basename) (Lit_Other "]") (Lit_Other "=") (SQ <_Dbg_complete_onoff>)}
    )
    (FuncDef
      name: _Dbg_do_set_basename
      body: 
        (BraceGroup
          children: [
            (C {(_Dbg_set_onoff)} {(DQ ($ VSub_Number "$1"))} {(SQ <basename>)})
            (ControlFlow token:<ControlFlow_Return return> arg_word:{($ VSub_QMark "$?")})
          ]
          spids: [94]
        )
      spids: [90 93]
    )
  ]
)