Class type Goog.​Positioning.​abstractPosition 

class type abstractPosition = object..end
method reposition : 
'a.
  (#Dom_html.element as 'a) Js.t ->
  Corner.corner ->
  Goog.Math.box Js.t Js.opt -> Goog.Math.size Js.t Js.opt -> unit Js.meth

Repositions the element. Abstract method, should be overloaded *