if !ok {
			continue
		}
		for _, hpa := range selectingHpas {
			hpas[hpa] = struct{}{}
		}
	}
	// Clean up all added pods.
	a.hpaSelectors.KeepOnly([]selectors.Key{})

	hpaList := []selectors.Key{}
	for hpa := range hpas {
		hpaList = append(hpaList, hpa)
	}
	return hpaList
}

// validateAndParseSelector verifies that: