@NotNull
 private static EditorColorsScheme getColorsScheme(
     @Nullable final EditorColorsScheme customScheme) {
   if (customScheme != null) {
     return customScheme;
   }
   return EditorColorsManager.getInstance().getGlobalScheme();
 }
 public void updateGlobalScheme() {
   myGlobalScheme =
       myCustomGlobalScheme == null
           ? EditorColorsManager.getInstance().getGlobalScheme()
           : myCustomGlobalScheme;
 }