Authors CurseForge

Well, I understand i can

local function Constructor()
        self=(AceGUI.WidgetRegistry['Frame'])()
        ...
end

But am I underestimating consequences?
If AceGUI lacks something like

function AceGUI:Inherits(type)
   local reg=WidgetRegistry
  local constructor=reg[type]
  if type(constructor)=='function' then 
     return constructor()
  else 
      error(("You can't inherit from not existant Widget type %s"):format(type))

  end
end

I suppose there is a design choice behind it but I cant figure it.
What am I missing? What am I doing wrong?

Thanks for your answer, and I will check your link as soon as wowace is back up (error 500 right now) but may be my question was misleading.
My concern is about not altering a widget coming from pool. If what I need is just the "raw" widget (i.e. the one directly returned from the constructor), isn't it an overkill to pull the full feratured widget from the pool? And besides that, as I find calling the constructor from AceGUI.WidgetRegistry works and suites my need, my other concern is: am I at risk of breaking something?

Okay, I'll take your word for it :) Many thanks