stackOrderNone function Stack orders Stacks
Returns the given series order [0, 1, … n - 1] where n is the number
of elements in series
. Thus, the stack order is given by the key accessor
(see Stack.keys).
final stack = Stack(…)..order = stackOrderNone;
Implementation
List<int> stackOrderNone(List<List<List<num>>> series) {
var n = series.length;
return List.generate(n, (i) => i);
}