Umbraco-CMS/src/Umbraco.Core/Runtime/IMainDomKeyGenerator.cs

namespace Umbraco.Cms.Core.Runtime
{
    /// <summary>
    /// Defines a class which can generate a distinct key for a MainDom boundary.
    /// </summary>
    public interface IMainDomKeyGenerator
    {
        /// <summary>
        /// Returns a key that signifies a MainDom boundary.
        /// </summary>
        string GenerateKey();
    }
}