(mongodb >=1.15.0)
MongoDB\Driver\ClientEncryption::addKeyAltName — Adds an alternate name to a key document
$keyId, string $keyAltName): ?object
Adds keyAltName to the set of alternate names for the
key document with the given UUID keyId.
keyIdkeyAltName
Returns the previous version of the key document, or null if no document
matched.