[WIP] Viewports backend

imgui-binding/src/main/java/imgui/callback/ImPlatformFuncViewportFloat.java

@@ -6,5 +6,5 @@ import imgui.ImGuiViewport;
  * Callback to represent ImGuiPlatformIO function with args: (ImGuiViewport*, String)
  */
 public abstract class ImPlatformFuncViewportFloat {
-    public abstract void accept(ImGuiViewport vp, Float f);
+    public abstract void accept(ImGuiViewport vp, float f);
 }