Assets\Script\IAPManager.cs(9,42): error CS0535: 'IAPManager' does not implement interface member 'IStoreListener.OnPurchaseFailed(Product, PurchaseFailureReason)'
このエラーの解決法わかる人いたら教えてください。
public class IAPManager : MonoBehaviour, IStoreListener
{
private static IStoreController m_StoreController;
private static IExtensionProvider m_StoreExtensionProvider;
⁝
　public void OnInitializeFailed(InitializationFailureReason error, string message)
　{
　Debug.Log("IAP initialization failed: " + error + ", " + message);
　}
⁝
}