GObject-Plugin/src/iface/PluginInterface.vala

/**
 * GObject Models.
 */
namespace GObject {

	/**
	 * Modules/Plugins.
	 */
	namespace Plugins {

		/**
		 * Plugin interface.
		 */
		public interface IPlugabble : Object {
		}

		/**
		 * Abstract Plugin.
		 */
		public abstract class Plugin : Object, IPlugabble {

			/**
			 * Host Interface.
			 */
			public IHost host { get; set; default = null; }
		}
	}
}