MentionableContext is defined in the Telligent.Evolution.Extensibility.Content.Version2 namespace.
Definition
class MentionableContext
{
MentionableContext();
Guid? ApplicationId { get; set; }
Guid? ApplicationTypeId { get; set; }
Guid? ContainerId { get; set; }
Guid? ContainerTypeId { get; set; }
}