return new DataBean(d.getActionsCount(), 1, nonNullSessions, d.getNumberOfActionsWithErrors());
}
@Override
protected DataBean join(DataBean one, DataBean two) {
return new DataBean(one.getActionsCount() + two.getActionsCount(),
one.getNumberOfSessions() + two.getNumberOfSessions(),
one.getNumberOfNonNullSessions() + two.getNumberOfNonNullSessions(),
one.getNumberOfActionsWithErrors() + two.getNumberOfActionsWithErrors());
}