public void AssertImplementedBy <T>(Expression <Func <T, object> > propertyRoute, Type typeToImplement) where T : Entity
{
var route = PropertyRoute.Construct(propertyRoute);
Implementations imp = GetImplementations(route);
if (imp.IsByAll || !imp.Types.Contains(typeToImplement))
{
throw new InvalidOperationException("Route {0} is not ImplementedBy {1}".FormatWith(route, typeToImplement.Name) +
"\r\n" +
Implementations.ConsiderMessage(route, imp.Types.And(typeToImplement).ToString(t => $"typeof({t.TypeName()})", ", ")));
}
}