Creates a new IEntity2 instance

Creates a new IEntity2 instance but uses a special constructor which will set the Fields object of the new IEntity2 instance to the passed in fields object. Implement this method to support multi-type in single table inheritance.

Creates a new entity instance but uses a special constructor which will set the Fields object of the new entity instance to the passed in fields object. Implement this method to support multi-type in single table inheritance.