String toJsonString() {
        try {
            return from(s3obj.getObjectContent());
        } catch (Exception e) {
            throw new SdkClientException("Error parsing JSON: " + e.getMessage());
        }
    }
Converts and return the underlying S3 object as a json string.

@throws SdkClientException if failed in JSON conversion.
aws-java-sdk-s3/src/main/java/com/amazonaws/services/s3/internal/crypto/v2/S3ObjectWrapper.java