public ContentCryptoScheme getContentCryptoScheme() {
        return contentCryptoScheme;
    }
S3 cryptographic scheme that includes the content crypto scheme and key
wrapping scheme (for the content-encrypting-key).
aws-java-sdk-s3/src/main/java/com/amazonaws/services/s3/internal/crypto/v1/S3CryptoScheme.java