private boolean isChunkedEncodingDisabled(SignableRequest<?> signableRequest) {
        if (signableRequest instanceof Request) {
            Request<?> request = (Request<?>) signableRequest;
            Boolean isChunkedEncodingDisabled = request
                    .getHandlerContext(S3HandlerContextKeys.IS_CHUNKED_ENCODING_DISABLED);
            return isChunkedEncodingDisabled != null && isChunkedEncodingDisabled;
        }
        return false;
    }
@return True if chunked encoding has been explicitly disabled per the request. False
        otherwise.
aws-java-sdk-s3/src/main/java/com/amazonaws/services/s3/internal/AWSS3V4Signer.java