Optional keyAn optional list of string alternate names used to reference a key.用于引用键的字符串备用名称的可选列表。
If a key is created with alternate names, then encryption may refer to the key by the unique alternate name instead of by _id.如果键是用备用名称创建的，那么加密可以通过唯一的备用名称而不是通过_id来引用键。
Optional Experimental keyOptional masterIdentifies a new KMS-specific key used to encrypt the new data key标识用于加密新数据键的新KMS特定键
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Options to provide when creating a new data key.创建新数据键时要提供的选项。