DecorateParams

Parameters for a decorator. These are the parameters that are passed
in to a Decorator's decorate method when it is called.

{
  fixElement:(el:BrowserElement, pos:PointXY, constraints:FixedElementConstraints, id:string) => FixedElement,
  layout:AbstractLayout<any>,
  setAbsolutePosition:(el:BrowserElement, xy:PointXY) => void,
  surface:Surface
}