If implementd, recursively copies data from the incoming domain object to the outgoing one, taking serialization levels into account. If a property does not conform to the requested serialization level - it will be assigned NULL. Must be called before sending data to client.

T Filter<T>(
	T item,
	byte level
)
where T : Dtobase

Function Filter(Of T As Dtobase) ( 
	item As T,
	level As Byte
) As T