/// <summary>Adds object items as a RDFS list set (return last item)</summary>
/// <returns><see cref="SubjectBuilder"/> for last list item</returns>
/// <exception cref="TypeMustNotBeANode"></exception>
public static SubjectBuilder List <T>(this SubjectBuilder self, params T[] literals) where T : notnull
=> self.List(literals.Select(x => self.Rdf().New(x))
.Cast <Node>().ToArray()
);
/// <summary>Adds literal items as a RDFS list set (return last item)</summary>
/// <returns><see cref="SubjectBuilder"/> for last list item</returns>
public static SubjectBuilder List(this SubjectBuilder self, params string[] literals)
=> self.List(literals.Select(x => self.Rdf().New(x))
.Cast <Node>().ToArray()
);