code: func CompareChainKeyAlgoUbiquity(chain1, chain2 []*x509.Certificate) int {
  	kau1 := ChainKeyAlgoUbiquity(chain1)
  	kau2 := ChainKeyAlgoUbiquity(chain2)
  	return int(kau1) - int(kau2)
  }
docs: // CompareChainKeyAlgoUbiquity returns a positive, zero, or negative value
  // if the public-key ubiquity of the first chain is greater, equal,
  // or less than the second chain.