unsafe float RefitAndMeasure(ref NodeChild child)
{
var node = nodes + child.Index;
//All nodes are guaranteed to have at least 2 children.
Debug.Assert(leafCount >= 2);
var premetric = ComputeBoundsMetric(ref child.Min, ref child.Max);
float childChange = 0;
ref var a = ref node->A;
unsafe float RefitAndMeasure(ref NodeChild child)
{
ref var node = ref Nodes[child.Index];
