public Person(Guid id,
PersonName name,
Email email,
Category category,
Person manager = null,
string fieldName = null)
: base(id, fieldName)
{
Name = name;
Email = email;
Category = category;
Manager = manager;
Name?.SetFieldName(GetPropertyName(() => Name));
Email?.SetFieldName(GetPropertyName(() => Email));
Category?.SetFieldName(GetPropertyName(() => Category));
Manager?.SetFieldName(GetPropertyName(() => Manager));
Validate();
}