if numFilter(val, unit) {
					return true
				}
			}
			return false
		}
		numLabelUnit := func(key string) string {
			return numLabelUnits[key]
		}
		if wantKey == "" {
			return func(s *profile.Sample) bool {
				for key, vals := range s.NumLabel {
					if labelFilter(vals, numLabelUnit(key)) {
						return true
					}
				}
				return false
			}, nil
		}