/*! This method checks whether the asset was rolled at the given time. */
protected bool isOnTime(double t)
{
TimeGrid grid = method().timeGrid();
return(Utils.close(grid[grid.index(t)], time()));
}
/*! This method checks whether the asset was rolled at the given time. */
protected bool isOnTime(double t)
{
TimeGrid grid = method().timeGrid();
return(Utils.close(grid[grid.index(t)], time()));
}