code: func (pks *PublicKeySegment) Revoked() bool {
  	for _, claim := range pks.Claims {
  		if claim.Body.ClaimType == primitive.RevocationClaimType {
  			return true
  		}
  	}
  
  	return false
  }
docs: // Revoked returns a bool indicating if any revocation claims exist against this
  // PublicKey