Notice about the docking and enable it for an example

imgui-lwjgl3/src/test/java/ImGuiGlfwExample.java

@@ -139,7 +139,7 @@ public final class ImGuiGlfwExample {
         final ImGuiIO io = ImGui.getIO();
 
         io.setIniFilename(null); // We don't want to save .ini file
-        io.setConfigFlags(ImGuiConfigFlags.NavEnableKeyboard); // Navigation with keyboard
+        io.setConfigFlags(ImGuiConfigFlags.NavEnableKeyboard | ImGuiConfigFlags.DockingEnable); // Navigation with keyboard and enabled docking
         io.setBackendFlags(ImGuiBackendFlags.HasMouseCursors); // Mouse cursors to display while resizing windows etc.
         io.setBackendPlatformName("imgui_java_impl_glfw");