Extend given HID to a desired level. The opposite of truncate. However, because there are many descendents, the result is a range of consecutive HIDs. The low and hi values are returned in the out variables.

public static Int64Pair Extend(
	long htmid,
	int level
)

public:
static Int64Pair Extend(
	long long htmid, 
	int level
)

static member Extend : 
        htmid:int64 * 
        level:int -> Int64Pair