private static void SaveTree<T>(
	Btree<T> node,
	ref string ret,
	int level,
	string levelSeparator = ""
)

Private Shared Sub SaveTree(Of T) ( 
	node As Btree(Of T),
	ByRef ret As String,
	level As Integer,
	Optional levelSeparator As String = ""
)

private:
generic<typename T>
static void SaveTree(
	Btree<T>^ node, 
	String^% ret, 
	int level, 
	String^ levelSeparator = L""
)

private static member SaveTree : 
        node : Btree<'T> * 
        ret : string byref * 
        level : int * 
        ?levelSeparator : string 
(* Defaults:
        let _levelSeparator = defaultArg levelSeparator ""
*)
-> unit