code: func (t *Taint) MatchTaint(taintToMatch *Taint) bool {
  	return t.Key == taintToMatch.Key && t.Effect == taintToMatch.Effect
  }
docs: // MatchTaint checks if the taint matches taintToMatch. Taints are unique by key:effect,
  // if the two taints have same key:effect, regard as they match.