unity method extensions

public static class Extensions
{
    /// <summary>
    /// extension method on Array of T
    /// returns true if array only contains null items
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <param name="array"></param>
    /// <returns></returns>
    public static bool ContainsOnlyNullItems<T>(this T[] array){
        foreach (var item in array){
            if (item != null) return false;
      }
        return true;
    }

    /// <summary>
    /// extension method on Array of T
    /// returns true if any item in Array is non null
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <param name="array"></param>
    /// <returns></returns>
    public static bool AnyNonNull<T>(this T[] array) {
        return !array.ContainsOnlyNullItems();
    }

    public static T GetInterface<T>(this GameObject inObj) where T : class
    {
        if (!typeof(T).IsInterface)
        {
            Debug.LogError(typeof(T).ToString() + ": is not an interface!");
            return null;
        }
        return inObj.GetComponents(typeof(MonoBehaviour)).OfType<T>().FirstOrDefault();
    }
}