public void Dispose()
{
_current = -1;
_parent?.Dispose();
_parent = default;
Pool <RangeExprEnumerator> .Return(this);
}
public RangeExprEnumerator Init(RangeExprEnumerable parent, int start, int workCount)
{
_current = -1;
_start = start;
_workCount = workCount;
_parent = parent;
return(this);
}