public Boolean getPreserveNulls() {
        return this.preserveNulls;
    }
<p>
Indicates whether NULL values are to be copied as NULL to encrypted tables (<code>TRUE</code>) or
cryptographically processed (<code>FALSE</code>).
</p>

@return Indicates whether NULL values are to be copied as NULL to encrypted tables (<code>TRUE</code>) or
        cryptographically processed (<code>FALSE</code>).
aws-java-sdk-cleanrooms/src/main/java/com/amazonaws/services/cleanrooms/model/DataEncryptionMetadata.java