FSharp indentation recommendation to become based on indent of first character in previous non-blank line

FSharpIndentationConstraint

[<AbstractClass>] 

(*
//instead of this calm indentation base on indent of first character in previous non-blank line

type View< 
  'Events, 
  'Window when 
    'Window :> Window and 
    'Window : (new : unit -> 'Window) 
  >(?window) =
*)

//we have to write this weird thing base on the position of special characters in previous lines
//making indentation base on identifier names
type View< 
          'Events, 
          'Window when 
            'Window :> Window and 
            'Window : (new : unit -> 'Window) 
  >(?window) =


let window = defaultArg window (new 'Window())

member this.Window = window