Custom array class question...

I am trying to find the length of an array(“Notes_Axis”) that is an element in another array(“Bar_Axis”)…but I get an error saying
System.Type’ does not support slicing.

var  Bar_Axis: Time[];
class Time{
	var Note_Axis: int  [];
}

var Test = 0;
function Update(){
	Test=Bar_Axis.GetLength(Time[0]);
}

I have also tried this, but it just finds the length of the Bar_Axis array and not the length of the first Note_Axis array.

Test=Bar_Axis.GetLength(0);

What is wrong?
Thanks

Test = Bar_Axis[0].Note_Axis.Length;