func (c *concreteSeriesIterator) Next() bool {
	c.cur++
	return c.cur < len(c.series.samples)
}
func (c *concreteSeriesIterator) Next() bool {
	c.cur++
	return c.cur < len(c.series.samples)
}
func ( c * concreteSeriesIterator ) Next ( ) bool { c . cur ++ return c . cur < len ( c . series . samples ) }
// Next implements storage.SeriesIterator.
Next implements storage . SeriesIterator .