@Override
    public void destroy() {
        if (!context.isRenderable()) {
            return;
        }

        cursorPosCallback.free();
        scrollCallback.free();
        mouseButtonCallback.free();

        for (long glfwCursor : jmeToGlfwCursorMap.values()) {
            glfwDestroyCursor(glfwCursor);
        }

        logger.fine("Mouse destroyed.");
    }
Check if the input is initialized.
@return <code>true</code> if the input is initialized and <code>false</code> otherwise.
jme3-vr/src/main/java/com/jme3/input/lwjgl/GlfwMouseInputVR.java