public String getAwsKmsEncryptionContext() {
        return awsKmsEncryptionContext;
    }
Returns the scheme used for encrypting the Amazon S3 object.
the encryption is either the default value "aws:kms" or "aws:kms:dsse".
aws-java-sdk-s3/src/main/java/com/amazonaws/services/s3/model/SSEAwsKeyManagementParams.java