public static bool HasAnnotation(this IAnnotated annotated, Type type) => annotated.Annotations(type)?.Any() == true;
public static IEnumerable <A> Annotations <A>(this IAnnotated annotated) => annotated.Annotations(typeof(A))?.Cast <A>() ?? Enumerable.Empty <A>();
public static bool TryGetAnnotation <A>(this IAnnotated annotated, out A annotation) where A : class
{
annotation = annotated.Annotations <A>()?.FirstOrDefault();
return(annotation != null);
}
public static object Annotation(this IAnnotated annotated, Type type) => annotated.Annotations(type)?.FirstOrDefault();
public static bool TryGetAnnotation(this IAnnotated annotated, Type type, out object annotation)
{
annotation = annotated.Annotations(type)?.FirstOrDefault();
return(annotation != null);
}