public void ServoUnityInit(ServoUnityPluginWindowCreatedCallback wccb, ServoUnityPluginWindowResizedCallback wrcb, ServoUnityPluginBrowserEventCallback becb, string userAgent)
{
windowCreatedCallback = wccb;
windowResizedCallback = wrcb;
browserEventCallback = becb;
// Create the callback stub prior to registering the callback on the native side.
windowCreatedCallbackGCH = GCHandle.Alloc(windowCreatedCallback); // Does not need to be pinned, see http://stackoverflow.com/a/19866119/316487
windowResizedCallbackGCH = GCHandle.Alloc(windowResizedCallback);
browserEventCallbackGCH = GCHandle.Alloc(browserEventCallback);
ServoUnityPlugin_pinvoke.servoUnityInit(windowCreatedCallback, windowResizedCallback, browserEventCallback, userAgent);
}