void GetBlocksOfType<T>(
	List<T> blocks,
	Func collect = null
)
where T : class

Sub GetBlocksOfType(Of T As Class) ( 
	blocks As List(Of T),
	Optional collect As Func = Nothing
)

generic<typename T>
where T : ref class
void GetBlocksOfType(
	List<T>^ blocks, 
	Func^ collect = nullptr
)

abstract GetBlocksOfType : 
        blocks : List<'T> * 
        ?collect : Func 
(* Defaults:
        let _collect = defaultArg collect null
*)
-> unit  when 'T : not struct