public Circle(CircleId id, CircleName name, UserId owner, List<UserId> members)
{
if (id == null) throw new ArgumentNullException(nameof(id));
if (name == null) throw new ArgumentNullException(nameof(name));
if (owner == null) throw new ArgumentNullException(nameof(owner));
if (members == null) throw new ArgumentNullException(nameof(members));
this.id = id;
this.name = name;
this.owner = owner;
this.members = members;
}
public void ChangeName(CircleName name)
{
if (name == null) throw new ArgumentNullException(nameof(name));
this.name = name;
}
