Umbraco-CMS/src/Umbraco.Core/Configuration/IUmbracoConfigurationSection.cs

namespace Umbraco.Cms.Core.Configuration
{
    /// <summary>
    /// Represents an Umbraco configuration section which can be used to pass to UmbracoConfiguration.For{T}
    /// </summary>
    public interface IUmbracoConfigurationSection
    {

    }
}