code: func IsNegative(a corev1.ResourceList) []corev1.ResourceName {
  	results := []corev1.ResourceName{}
  	zero := resource.MustParse("0")
  	for k, v := range a {
  		if v.Cmp(zero) < 0 {
  			results = append(results, k)
  		}
  	}
  	return results
  }
docs: // IsNegative returns the set of resource names that have a negative value.