ProxyGenerator/src-examples/ProxyInterfaceConsumerForPnP/Interfaces/ISecurableObject.cs

namespace ProxyInterfaceConsumerForPnP.Interfaces
{
    [ProxyInterfaceGenerator.Proxy(typeof(Microsoft.SharePoint.Client.SecurableObject))]
    public partial interface ISecurableObject : IClientObject
    {
        // public virtual void X();
    }
}