anchor.diff:  open Aardvark.Rendering.GL
   open Aardvark.Application
   
  +module Config =
  +    let mutable useSharingControl = false
   
   type OpenGlApplication(forceNvidia : bool, enableDebug : bool) =
       do if forceNvidia then Aardvark.Base.DynamicLinker.tryLoadLibrary "nvapi64.dll" |> ignore
  
positive.code:                     Log.stop()
                  )
  
                  handle.ReleaseCurrent()
                  ctx.CurrentContextHandle <- None
                  ContextHandle.Current <- None
  
      new(enableDebug) = new OpenGlApplication(true, enableDebug)
      new() = new OpenGlApplication(true, false)
  
negative.code: 
      let init =
          let initialized = ref false
          fun (ctx : Context)->
              if not !initialized then
                  initialized := true
  
                  using ctx.ResourceLock (fun _ ->
                      try GLVM.vmInit()
  