Unity 3d editor plugin code in F#

SomeClassFSharp.fs

namespace Assembly_FSharp_vs
open UnityEditor
open UnityEngine

type public SomeTool() =
  inherit UnityEditor.EditorWindow()
  //
  [<MenuItem("MySelection/Print Selection")>]
  static member ShowWindow() = UnityEditor.EditorWindow.GetWindow(typeof<SomeTool>)

  //
  member this.OnGUI() =
    if GUILayout.Button("Button") then this.Initialize()

  //
  member public this.Initialize() =
    let selectedObjects = Selection.objects
    for _ in selectedObjects do
      Debug.Log("some object")